diff --git a/zh-cn/application-dev/reference/apis/js-apis-inputmethod-extension-context.md b/zh-cn/application-dev/reference/apis/js-apis-inputmethod-extension-context.md
index 1c9e18fee0ba6ad6597d1337435f6b444122fc95..916f9c9c04cd63f611621bd651c71217e35e03f4 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inputmethod-extension-context.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inputmethod-extension-context.md
@@ -43,7 +43,7 @@ destroy(callback: AsyncCallback\<void>): void
 **示例：**
 
 ```ts
-this.context.destroy((err: Error) => {
+this.context.destroy((err: BusinessError) => {
   if(err) {
     console.log('Failed to destroy context.');
     return;
@@ -71,7 +71,7 @@ destroy(): Promise\<void>;
 ```ts
 this.context.destroy().then(() => {
   console.log('Succeed in destroying context.');
-}).catch((err: Error)=>{
+}).catch((err: BusinessError)=>{
   console.log('Failed to destroy context.');
 });
 ```
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inputmethod.md b/zh-cn/application-dev/reference/apis/js-apis-inputmethod.md
index eed9555026cfafc2562956654d25d4609339e324..5c0d33c0f793333a18140e31499c0d9c829d874e 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inputmethod.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inputmethod.md
@@ -128,7 +128,7 @@ switchInputMethod(target: InputMethodProperty, callback: AsyncCallback&lt;boolea
 ```ts
 let currentIme = inputMethod.getCurrentInputMethod();
 try{
-  inputMethod.switchInputMethod(currentIme, (err: Error, result: boolean) => {
+  inputMethod.switchInputMethod(currentIme, (err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to switchInputMethod: ${JSON.stringify(err)}`);
       return;
@@ -184,7 +184,7 @@ try {
     } else {
       console.error('Failed to switchInputMethod.');
     }
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to switchInputMethod: ${JSON.stringify(err)}`);
   })
 } catch (err) {
@@ -257,7 +257,7 @@ try {
     icon: "",
     iconId: 0,
     extra: extra
-  }, (err: Error, result: boolean) => {
+  }, (err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to switchCurrentInputMethodSubtype: ${JSON.stringify(err)}`);
       return;
@@ -329,7 +329,7 @@ try {
     } else {
       console.error('Failed to switchCurrentInputMethodSubtype.');
     }
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to switchCurrentInputMethodSubtype: ${JSON.stringify(err)}`);
   })
 } catch(err) {
@@ -390,7 +390,7 @@ switchCurrentInputMethodAndSubtype(inputMethodProperty: InputMethodProperty, inp
 let currentIme = inputMethod.getCurrentInputMethod();
 let imSubType = inputMethod.getCurrentInputMethodSubtype();
 try {
-  inputMethod.switchCurrentInputMethodAndSubtype(currentIme, imSubType, (err: Error, result: boolean) => {
+  inputMethod.switchCurrentInputMethodAndSubtype(currentIme, imSubType, (err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to switchCurrentInputMethodAndSubtype: ${JSON.stringify(err)}`);
       return;
@@ -450,7 +450,7 @@ try {
     } else {
       console.error('Failed to switchCurrentInputMethodAndSubtype.');
     }
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to switchCurrentInputMethodAndSubtype: ${JSON.stringify(err)}`);
   })
 } catch(err) {
@@ -704,7 +704,7 @@ try {
       enterKeyType: 1
     }
   };
-  inputMethodController.attach(true, textConfig, (err: Error) => {
+  inputMethodController.attach(true, textConfig, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to attach: ${JSON.stringify(err)}`);
       return;
@@ -762,7 +762,7 @@ try {
   };
   inputMethodController.attach(true, textConfig).then(() => {
     console.log('Succeeded in attaching inputMethod.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to attach: ${JSON.stringify(err)}`);
   })
 } catch(err) {
@@ -801,7 +801,7 @@ showTextInput(callback: AsyncCallback&lt;void&gt;): void
 **示例：**
 
 ```ts
-inputMethodController.showTextInput((err: Error) => {
+inputMethodController.showTextInput((err: BusinessError) => {
   if (err) {
     console.error(`Failed to showTextInput: ${JSON.stringify(err)}`);
     return;
@@ -843,7 +843,7 @@ showTextInput(): Promise&lt;void&gt;
 ```ts
 inputMethodController.showTextInput().then(() => {
   console.log('Succeeded in showing text input.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to showTextInput: ${JSON.stringify(err)}`);
 });
 ```
@@ -881,7 +881,7 @@ hideTextInput(callback: AsyncCallback&lt;void&gt;): void
 **示例：**
 
 ```ts
-inputMethodController.hideTextInput((err: Error) => {
+inputMethodController.hideTextInput((err: BusinessError) => {
   if (err) {
     console.error(`Failed to hideTextInput: ${JSON.stringify(err)}`);
     return;
@@ -925,7 +925,7 @@ hideTextInput(): Promise&lt;void&gt;
 ```ts
 inputMethodController.hideTextInput().then(() => {
   console.log('Succeeded in hiding inputMethod.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to hideTextInput: ${JSON.stringify(err)}`);
 })
 ```
@@ -956,7 +956,7 @@ detach(callback: AsyncCallback&lt;void&gt;): void
 **示例：**
 
 ```ts
-inputMethodController.detach((err: Error) => {
+inputMethodController.detach((err: BusinessError) => {
   if (err) {
     console.error(`Failed to detach: ${JSON.stringify(err)}`);
     return;
@@ -993,7 +993,7 @@ detach(): Promise&lt;void&gt;
 ```ts
 inputMethodController.detach().then(() => {
   console.log('Succeeded in detaching inputMethod.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to detach: ${JSON.stringify(err)}`);
 });
 ```
@@ -1032,7 +1032,7 @@ setCallingWindow(windowId: number, callback: AsyncCallback&lt;void&gt;): void
 ```ts
 try {
   let windowId: number = 2000;
-  inputMethodController.setCallingWindow(windowId, (err: Error) => {
+  inputMethodController.setCallingWindow(windowId, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to setCallingWindow: ${JSON.stringify(err)}`);
       return;
@@ -1085,7 +1085,7 @@ try {
   let windowId: number = 2000;
   inputMethodController.setCallingWindow(windowId).then(() => {
     console.log('Succeeded in setting callingWindow.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to setCallingWindow: ${JSON.stringify(err)}`);
   })
 } catch(err) {
@@ -1123,7 +1123,7 @@ updateCursor(cursorInfo: CursorInfo, callback: AsyncCallback&lt;void&gt;): void
 ```ts
 try {
   let cursorInfo: inputMethod.CursorInfo = { left: 0, top: 0, width: 600, height: 800 };
-  inputMethodController.updateCursor(cursorInfo, (err: Error) => {
+  inputMethodController.updateCursor(cursorInfo, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to updateCursor: ${JSON.stringify(err)}`);
       return;
@@ -1172,7 +1172,7 @@ try {
   let cursorInfo: inputMethod.CursorInfo = { left: 0, top: 0, width: 600, height: 800 };
   inputMethodController.updateCursor(cursorInfo).then(() => {
     console.log('Succeeded in updating cursorInfo.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to updateCursor: ${JSON.stringify(err)}`);
   })
 } catch(err) {
@@ -1211,7 +1211,7 @@ changeSelection(text: string, start: number, end: number, callback: AsyncCallbac
 
 ```ts
 try {
-  inputMethodController.changeSelection('text', 0, 5, (err: Error) => {
+  inputMethodController.changeSelection('text', 0, 5, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to changeSelection: ${JSON.stringify(err)}`);
       return;
@@ -1261,7 +1261,7 @@ changeSelection(text: string, start: number, end: number): Promise&lt;void&gt;
 try {
   inputMethodController.changeSelection('test', 0, 5).then(() => {
     console.log('Succeeded in changing selection.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to changeSelection: ${JSON.stringify(err)}`);
   })
 } catch(err) {
@@ -1299,7 +1299,7 @@ updateAttribute(attribute: InputAttribute, callback: AsyncCallback&lt;void&gt;):
 ```ts
 try {
   let inputAttribute: inputMethod.InputAttribute = { textInputType: 0, enterKeyType: 1 };
-  inputMethodController.updateAttribute(inputAttribute, (err: Error) => {
+  inputMethodController.updateAttribute(inputAttribute, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to updateAttribute: ${JSON.stringify(err)}`);
       return;
@@ -1348,7 +1348,7 @@ try {
   let inputAttribute: inputMethod.InputAttribute = { textInputType: 0, enterKeyType: 1 };
   inputMethodController.updateAttribute(inputAttribute).then(() => {
     console.log('Succeeded in updating attribute.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to updateAttribute: ${JSON.stringify(err)}`);
   })
 } catch(err) {
@@ -1387,7 +1387,7 @@ stopInputSession(callback: AsyncCallback&lt;boolean&gt;): void
 
 ```ts
 try {
-  inputMethodController.stopInputSession((err: Error, result: boolean) => {
+  inputMethodController.stopInputSession((err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to stopInputSession: ${JSON.stringify(err)}`);
       return;
@@ -1440,7 +1440,7 @@ try {
     } else {
       console.error('Failed to stopInputSession.');
     }
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to stopInputSession: ${JSON.stringify(err)}`);
   })
 } catch(err) {
@@ -1480,7 +1480,7 @@ showSoftKeyboard(callback: AsyncCallback&lt;void&gt;): void
 **示例：**
 
 ```ts
-inputMethodController.showSoftKeyboard((err: Error) => {
+inputMethodController.showSoftKeyboard((err: BusinessError) => {
   if (!err) {
     console.log('Succeeded in showing softKeyboard.');
   } else {
@@ -1523,7 +1523,7 @@ showSoftKeyboard(): Promise&lt;void&gt;
 ```ts
 inputMethodController.showSoftKeyboard().then(() => {
   console.log('Succeeded in showing softKeyboard.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to show softKeyboard: ${JSON.stringify(err)}`);
 });
 ```
@@ -1560,7 +1560,7 @@ hideSoftKeyboard(callback: AsyncCallback&lt;void&gt;): void
 **示例：**
 
 ```ts
-inputMethodController.hideSoftKeyboard((err: Error) => {
+inputMethodController.hideSoftKeyboard((err: BusinessError) => {
   if (!err) {
     console.log('Succeeded in hiding softKeyboard.');
   } else {
@@ -1603,7 +1603,7 @@ hideSoftKeyboard(): Promise&lt;void&gt;
 ```ts
 inputMethodController.hideSoftKeyboard().then(() => {
   console.log('Succeeded in hiding softKeyboard.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to hide softKeyboard: ${JSON.stringify(err)}`);
 });
 ```
@@ -1631,7 +1631,7 @@ stopInput(callback: AsyncCallback&lt;boolean&gt;): void
 **示例：**
 
 ```ts
-inputMethodController.stopInput((err: Error, result: boolean) => {
+inputMethodController.stopInput((err: BusinessError, result: boolean) => {
   if (err) {
     console.error(`Failed to stopInput: ${JSON.stringify(err)}`);
     return;
@@ -1673,7 +1673,7 @@ inputMethodController.stopInput().then((result: boolean) => {
   } else {
     console.error('Failed to stopInput.');
   }
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to stopInput: ${JSON.stringify(err)}`);
 })
 ```
@@ -2577,7 +2577,7 @@ let inputMethodProperty: inputMethod.InputMethodProperty = {
   id: 'propertyId',
 }
 try {
-  inputMethodSetting.listInputMethodSubtype(inputMethodProperty, (err: Error, data: Array<InputMethodSubtype>) => {
+  inputMethodSetting.listInputMethodSubtype(inputMethodProperty, (err: BusinessError, data: Array<InputMethodSubtype>) => {
     if (err) {
       console.error(`Failed to listInputMethodSubtype: ${JSON.stringify(err)}`);
       return;
@@ -2665,7 +2665,7 @@ listCurrentInputMethodSubtype(callback: AsyncCallback&lt;Array&lt;InputMethodSub
 
 ```ts
 try {
-  inputMethodSetting.listCurrentInputMethodSubtype((err: Error, data: Array<InputMethodSubtype>) => {
+  inputMethodSetting.listCurrentInputMethodSubtype((err: BusinessError, data: Array<InputMethodSubtype>) => {
     if (err) {
       console.error(`Failed to listCurrentInputMethodSubtype: ${JSON.stringify(err)}`);
       return;
@@ -2748,7 +2748,7 @@ getInputMethods(enable: boolean, callback: AsyncCallback&lt;Array&lt;InputMethod
 
 ```ts
 try {
-  inputMethodSetting.getInputMethods(true, (err: Error, data: Array<inputMethod.InputMethodProperty>) => {
+  inputMethodSetting.getInputMethods(true, (err: BusinessError, data: Array<inputMethod.InputMethodProperty>) => {
     if (err) {
       console.error(`Failed to getInputMethods: ${JSON.stringify(err)}`);
       return;
@@ -2835,7 +2835,7 @@ showOptionalInputMethods(callback: AsyncCallback&lt;boolean&gt;): void
 
 ```ts
 try {
-  inputMethodSetting.showOptionalInputMethods((err: Error, data: boolean) => {
+  inputMethodSetting.showOptionalInputMethods((err: BusinessError, data: boolean) => {
     if (err) {
       console.error(`Failed to showOptionalInputMethods: ${JSON.stringify(err)}`);
       return;
@@ -2900,7 +2900,7 @@ listInputMethod(callback: AsyncCallback&lt;Array&lt;InputMethodProperty&gt;&gt;)
 **示例：**
 
 ```ts
-inputMethodSetting.listInputMethod((err: Error, data: Array<inputMethod.InputMethodProperty>) => {
+inputMethodSetting.listInputMethod((err: BusinessError, data: Array<inputMethod.InputMethodProperty>) => {
   if (err) {
     console.error(`Failed to listInputMethod: ${JSON.stringify(err)}`);
     return;
@@ -2958,7 +2958,7 @@ displayOptionalInputMethod(callback: AsyncCallback&lt;void&gt;): void
 **示例：**
 
 ```ts
-inputMethodSetting.displayOptionalInputMethod((err: Error) => {
+inputMethodSetting.displayOptionalInputMethod((err: BusinessError) => {
   if (err) {
     console.error(`Failed to displayOptionalInputMethod: ${JSON.stringify(err)}`);
     return;
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inputmethodengine.md b/zh-cn/application-dev/reference/apis/js-apis-inputmethodengine.md
index b45703720f190c6163b986c2dfbc013361a7ea57..c16af7541c317beb256c868ddcb1543be256fed6 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inputmethodengine.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inputmethodengine.md
@@ -512,7 +512,7 @@ let panelInfo: inputMethodEngine.PanelInfo = {
 }
 try {
   inputMethodEngine.getInputMethodAbility()
-    .createPanel(this.context, panelInfo, (err: Error, panel: inputMethodEngine.Panel) => {
+    .createPanel(this.context, panelInfo, (err: BusinessError, panel: inputMethodEngine.Panel) => {
       if (err) {
         console.error(`Failed to createPanel: ${JSON.stringify(err)}`);
         return;
@@ -560,7 +560,7 @@ let panelInfo: inputMethodEngine.PanelInfo = {
 inputMethodEngine.getInputMethodAbility().createPanel(this.context, panelInfo)
   .then((panel: inputMethodEngine.Panel) => {
     console.log('Succeed in creating panel.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create panel: ${JSON.stringify(err)}`);
   })
 ```
@@ -590,7 +590,7 @@ let panelInfo: inputMethodEngine.PanelInfo = {
 let inputPanel: inputMethodEngine.Panel | undefined = undefined;
 try {
   inputMethodEngine.getInputMethodAbility()
-    .createPanel(this.context, panelInfo, (err: Error, panel: inputMethodEngine.Panel) => {
+    .createPanel(this.context, panelInfo, (err: BusinessError, panel: inputMethodEngine.Panel) => {
       if (err) {
         console.error(`Failed to create panel: ${JSON.stringify(err)}`);
         return;
@@ -603,7 +603,7 @@ try {
 }
 try {
   if (inputPanel) {
-    inputMethodEngine.getInputMethodAbility().destroyPanel(inputPanel, (err: Error) => {
+    inputMethodEngine.getInputMethodAbility().destroyPanel(inputPanel, (err: BusinessError) => {
       if (err !== undefined) {
         console.error(`Failed to destroy panel: ${JSON.stringify(err)}`);
         return;
@@ -645,7 +645,7 @@ let panelInfo: inputMethodEngine.PanelInfo = {
 let inputPanel: inputMethodEngine.Panel | undefined = undefined;
 try {
   inputMethodEngine.getInputMethodAbility()
-    .createPanel(this.context, panelInfo, (err: Error, panel: inputMethodEngine.Panel) => {
+    .createPanel(this.context, panelInfo, (err: BusinessError, panel: inputMethodEngine.Panel) => {
       if (err) {
         console.error(`Failed to create panel: ${JSON.stringify(err)}`);
         return;
@@ -661,7 +661,7 @@ try {
   if (inputPanel) {
     inputMethodEngine.getInputMethodAbility().destroyPanel(inputPanel).then(() => {
       console.log('Succeed in destroying panel.');
-    }).catch((err: Error) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to destroy panel: ${JSON.stringify(err)}`);
     });
   }
@@ -996,7 +996,7 @@ setUiContent(path: string, callback: AsyncCallback\<void>): void
 
 ```ts
 try {
-  panel.setUiContent('pages/page2/page2', (err: Error) => {
+  panel.setUiContent('pages/page2/page2', (err: BusinessError) => {
     if (err) {
       console.error(`Failed to setUiContent: ${JSON.stringify(err)}`);
       return;
@@ -1034,7 +1034,7 @@ setUiContent(path: string): Promise\<void>
 try {
   panel.setUiContent('pages/page2/page2').then(() => {
     console.log('Succeeded in setting the content.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to setUiContent: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -1064,7 +1064,7 @@ setUiContent(path: string, storage: LocalStorage, callback: AsyncCallback\<void>
 let storage = new LocalStorage();
 storage.setOrCreate('storageSimpleProp',121);
 try {
-  panel.setUiContent('pages/page2/page2', storage, (err: Error) => {
+  panel.setUiContent('pages/page2/page2', storage, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to setUiContent: ${JSON.stringify(err)}`);
       return;
@@ -1105,7 +1105,7 @@ storage.setOrCreate('storageSimpleProp',121);
 try {
   panel.setUiContent('pages/page2/page2')then(() => {
     console.log('Succeeded in setting the content.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to setUiContent: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -1137,7 +1137,7 @@ resize(width: number, height: number, callback: AsyncCallback\<void>): void
 
 ```ts
 try {
-  panel.resize(500, 1000, (err: Error) => {
+  panel.resize(500, 1000, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to resize panel: ${JSON.stringify(err)}`);
       return;
@@ -1180,7 +1180,7 @@ resize(width: number, height: number): Promise\<void>;
 try {
   panel.resize(500, 1000).then(() => {
     console.log('Succeeded in changing the panel size.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to resize panel: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -1208,7 +1208,7 @@ moveTo(x: number, y: number, callback: AsyncCallback\<void>): void
 
 ```ts
 try {
-  panel.moveTo(300, 300, (err: Error) =>{
+  panel.moveTo(300, 300, (err: BusinessError) =>{
     if (err) {
       console.error(`Failed to move panel: ${JSON.stringify(err)}`);
       return;
@@ -1247,7 +1247,7 @@ moveTo(x: number, y: number): Promise\<void>
 try {
   panel.moveTo(300, 300).then(() => {
     console.log('Succeeded in moving the panel.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to move panel: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -1272,7 +1272,7 @@ show(callback: AsyncCallback\<void>): void
 **示例：**
 
 ```ts
-panel.show((err: Error) => {
+panel.show((err: BusinessError) => {
   if (err) {
     console.error(`Failed to show panel: ${JSON.stringify(err)}`);
     return;
@@ -1300,7 +1300,7 @@ show(): Promise\<void>
 ```ts
 panel.show().then(() => {
   console.log('Succeeded in showing the panel.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to show panel: ${JSON.stringify(err)}`);
 });
 ```
@@ -1322,7 +1322,7 @@ hide(callback: AsyncCallback\<void>): void
 **示例：**
 
 ```ts
-panel.hide((err: Error) => {
+panel.hide((err: BusinessError) => {
   if (err) {
     console.error(`Failed to hide panel: ${JSON.stringify(err)}`);
     return;
@@ -1350,7 +1350,7 @@ hide(): Promise\<void>
 ```ts
 panel.hide().then(() => {
   console.log('Succeeded in hiding the panel.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to hide panel: ${JSON.stringify(err)}`);
 });
 ```
@@ -1493,7 +1493,7 @@ hide(callback: AsyncCallback&lt;void&gt;): void
 **示例：**
 
 ```ts
-keyboardController.hide((err: Error) => {
+keyboardController.hide((err: BusinessError) => {
   if (err) {
     console.error(`Failed to hide: ${JSON.stringify(err)}`);
     return;
@@ -1529,7 +1529,7 @@ hide(): Promise&lt;void&gt;
 ```ts
 keyboardController.hide().then(() => {
   console.log('Succeeded in hiding keyboard.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.log(`Failed to hide: ${JSON.stringify(err)}`);
 });
 ```
@@ -1555,7 +1555,7 @@ hideKeyboard(callback: AsyncCallback&lt;void&gt;): void
 **示例：**
 
 ```ts
-keyboardController.hideKeyboard((err: Error) => {
+keyboardController.hideKeyboard((err: BusinessError) => {
   if (err) {
     console.error(`Failed to hideKeyboard: ${JSON.stringify(err)}`);
     return;
@@ -1587,7 +1587,7 @@ hideKeyboard(): Promise&lt;void&gt;
 ```ts
 keyboardController.hideKeyboard().then(() => {
   console.log('Succeeded in hiding keyboard.');
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.log(`Failed to hideKeyboard: ${JSON.stringify(err)}`);
 });
 ```
@@ -1671,7 +1671,7 @@ sendKeyFunction(action:number, callback: AsyncCallback&lt;boolean&gt;): void
 ```ts
 let action = 1;
 try {
-  inputClient.sendKeyFunction(action, (err: Error, result: boolean) => {
+  inputClient.sendKeyFunction(action, (err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to sendKeyFunction: ${JSON.stringify(err)}`);
       return;
@@ -1726,7 +1726,7 @@ try {
     } else {
       console.error('Failed to sendKeyFunction.');
     }
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to sendKeyFunction: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -1763,7 +1763,7 @@ getForward(length:number, callback: AsyncCallback&lt;string&gt;): void
 ```ts
 let length = 1;
 try {
-  inputClient.getForward(length, (err: Error, text: string) => {
+  inputClient.getForward(length, (err: BusinessError, text: string) => {
     if (err) {
       console.error(`Failed to getForward: ${JSON.stringify(err)}`);
       return;
@@ -1811,7 +1811,7 @@ let length = 1;
 try {
   inputClient.getForward(length).then((text: string) => {
     console.log('Succeeded in getting forward, text: ' + text);
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to getForward: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -1889,7 +1889,7 @@ getBackward(length:number, callback: AsyncCallback&lt;string&gt;): void
 ```ts
 let length = 1;
 try {
-  inputClient.getBackward(length, (err: Error, text: string) => {
+  inputClient.getBackward(length, (err: BusinessError, text: string) => {
     if (err) {
       console.error(`Failed to getBackward: ${JSON.stringify(err)}`);
       return;
@@ -1937,7 +1937,7 @@ let length = 1;
 try {
   inputClient.getBackward(length).then((text: string) => {
     console.log('Succeeded in getting backward, text: ' + text);
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to getBackward: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -2015,7 +2015,7 @@ deleteForward(length:number, callback: AsyncCallback&lt;boolean&gt;): void
 ```ts
 let length = 1;
 try {
-  inputClient.deleteForward(length, (err: Error, result: boolean) => {
+  inputClient.deleteForward(length, (err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to deleteForward: ${JSON.stringify(err)}`);
       return;
@@ -2071,7 +2071,7 @@ try {
     } else {
       console.error('Failed to delete Forward.');
     }
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to deleteForward: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -2143,7 +2143,7 @@ deleteBackward(length:number, callback: AsyncCallback&lt;boolean&gt;): void
 ```ts
 let length = 1;
 try {
-  inputClient.deleteBackward(length, (err: Error, result: boolean) => {
+  inputClient.deleteBackward(length, (err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to deleteBackward: ${JSON.stringify(err)}`);
       return;
@@ -2198,7 +2198,7 @@ inputClient.deleteBackward(length).then((result: boolean) => {
   } else {
     console.error('Failed to deleteBackward.');
   }
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to deleteBackward: ${JSON.stringify(err)}`);
 });
 ```
@@ -2265,7 +2265,7 @@ insertText(text:string, callback: AsyncCallback&lt;boolean&gt;): void
 **示例：**
 
 ```ts
-inputClient.insertText('test', (err: Error, result: boolean) => {
+inputClient.insertText('test', (err: BusinessError, result: boolean) => {
   if (err) {
     console.error(`Failed to insertText: ${JSON.stringify(err)}`);
     return;
@@ -2317,7 +2317,7 @@ try {
     } else {
       console.error('Failed to insertText.');
     }
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to insertText: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -2384,7 +2384,7 @@ getEditorAttribute(callback: AsyncCallback&lt;EditorAttribute&gt;): void
 **示例：**
 
 ```ts
-inputClient.getEditorAttribute((err: Error, editorAttribute: inputMethodEngine.EditorAttribute) => {
+inputClient.getEditorAttribute((err: BusinessError, editorAttribute: inputMethodEngine.EditorAttribute) => {
   if (err) {
     console.error(`Failed to getEditorAttribute: ${JSON.stringify(err)}`);
     return;
@@ -2422,7 +2422,7 @@ getEditorAttribute(): Promise&lt;EditorAttribute&gt;
 inputClient.getEditorAttribute().then((editorAttribute: inputMethodEngine.EditorAttribute) => {
   console.log('editorAttribute.inputPattern: ' + JSON.stringify(editorAttribute.inputPattern));
   console.log('editorAttribute.enterKeyType: ' + JSON.stringify(editorAttribute.enterKeyType));
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to getEditorAttribute: ${JSON.stringify(err)}`);
 });
 ```
@@ -2487,7 +2487,7 @@ moveCursor(direction: number, callback: AsyncCallback&lt;void&gt;): void
 
 ```ts
 try {
-  inputClient.moveCursor(inputMethodEngine.Direction.CURSOR_UP, (err: Error) => {
+  inputClient.moveCursor(inputMethodEngine.Direction.CURSOR_UP, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to moveCursor: ${JSON.stringify(err)}`);
       return;
@@ -2533,7 +2533,7 @@ moveCursor(direction: number): Promise&lt;void&gt;
 try {
   inputClient.moveCursor(inputMethodEngine.Direction.CURSOR_UP).then(() => {
     console.log('Succeeded in moving cursor.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to moveCursor: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -2603,7 +2603,7 @@ selectByRange(range: Range, callback: AsyncCallback&lt;void&gt;): void
 ```ts
 try {
   let range: inputMethodEngine.Range = { start: 0, end: 1 };
-  inputClient.selectByRange(range, (err: Error) => {
+  inputClient.selectByRange(range, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to selectByRange: ${JSON.stringify(err)}`);
       return;
@@ -2651,7 +2651,7 @@ try {
   let range: inputMethodEngine.Range = { start: 0, end: 1 };
   inputClient.selectByRange(range).then(() => {
     console.log('Succeeded in selecting by range.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to selectByRange: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -2723,7 +2723,7 @@ selectByMovement(movement: Movement, callback: AsyncCallback&lt;void&gt;): void
 ```ts
 try {
   let movement: inputMethodEngine.Movement = { direction: 1 };
-  inputClient.selectByMovement(movement, (err: Error) => {
+  inputClient.selectByMovement(movement, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to selectByMovement: ${JSON.stringify(err)}`);
       return;
@@ -2771,7 +2771,7 @@ try {
   let movement: inputMethodEngine.Movement = { direction: 1 };
   inputClient.selectByMovement(movement).then(() => {
     console.log('Succeeded in selecting by movement.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to selectByMovement: ${JSON.stringify(err)}`);
   });
 } catch (err) {
@@ -2840,7 +2840,7 @@ getTextIndexAtCursor(callback: AsyncCallback&lt;number&gt;): void
 **示例：**
 
 ```ts
-inputClient.getTextIndexAtCursor((err: Error, index: number) => {
+inputClient.getTextIndexAtCursor((err: BusinessError, index: number) => {
   if (err) {
     console.error(`Failed to getTextIndexAtCursor: ${JSON.stringify(err)}`);
     return;
@@ -2877,7 +2877,7 @@ getTextIndexAtCursor(): Promise&lt;number&gt;
 ```ts
 inputClient.getTextIndexAtCursor().then((index: number) => {
   console.log('Succeeded in getTextIndexAtCursor: ' + index);
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to getTextIndexAtCursor: ${JSON.stringify(err)}`);
 });
 ```
@@ -2948,7 +2948,7 @@ sendExtendAction(action: ExtendAction, callback: AsyncCallback&lt;void&gt;): voi
 
 ```ts
 try {
-  inputClient.sendExtendAction(inputMethodEngine.ExtendAction.COPY, (err: Error) => {
+  inputClient.sendExtendAction(inputMethodEngine.ExtendAction.COPY, (err: BusinessError) => {
     if (err) {
       console.error(`Failed to sendExtendAction: ${JSON.stringify(err)}`);
       return;
@@ -2999,7 +2999,7 @@ sendExtendAction(action: ExtendAction): Promise&lt;void&gt;
 try {
   inputClient.sendExtendAction(inputMethodEngine.ExtendAction.COPY).then(() => {
     console.log('Succeeded in sending extend action.');
-  }).catch((err: Error) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to sendExtendAction: ${JSON.stringify(err)}`);
   });
 } catch(err) {
@@ -3093,7 +3093,7 @@ getForward(length:number, callback: AsyncCallback&lt;string&gt;): void
 
 ```ts
 let length = 1;
-textInputClient.getForward(length, (err: Error, text: string) => {
+textInputClient.getForward(length, (err: BusinessError, text: string) => {
   if (err) {
     console.error(`Failed to getForward: ${JSON.stringify(err)}`);
     return;
@@ -3132,7 +3132,7 @@ getForward(length:number): Promise&lt;string&gt;
 let length = 1;
 textInputClient.getForward(length).then((text: string) => {
   console.log('Succeeded in getting forward, text: ' + text);
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to getForward: ${JSON.stringify(err)}`);
 });
 ```
@@ -3160,7 +3160,7 @@ getBackward(length:number, callback: AsyncCallback&lt;string&gt;): void
 
 ```ts
 let length = 1;
-textInputClient.getBackward(length, (err: Error, text: string) => {
+textInputClient.getBackward(length, (err: BusinessError, text: string) => {
   if (err) {
     console.error(`Failed to getBackward: ${JSON.stringify(err)}`);
     return;
@@ -3199,7 +3199,7 @@ getBackward(length:number): Promise&lt;string&gt;
 let length = 1;
 textInputClient.getBackward(length).then((text: string) => {
   console.log('Succeeded in getting backward: ' + JSON.stringify(text));
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to getBackward: ${JSON.stringify(err)}`);
 });
 ```
@@ -3227,7 +3227,7 @@ deleteForward(length:number, callback: AsyncCallback&lt;boolean&gt;): void
 
 ```ts
 let length = 1;
-textInputClient.deleteForward(length, (err: Error, result: boolean) => {
+textInputClient.deleteForward(length, (err: BusinessError, result: boolean) => {
   if (err) {
     console.error(`Failed to deleteForward: ${JSON.stringify(err)}`);
     return;
@@ -3274,7 +3274,7 @@ textInputClient.deleteForward(length).then((result: boolean) => {
   } else {
     console.error('Failed to delete forward.');
   }
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to deleteForward: ${JSON.stringify(err)}`);
 });
 ```
@@ -3302,7 +3302,7 @@ deleteBackward(length:number, callback: AsyncCallback&lt;boolean&gt;): void
 
 ```ts
 let length = 1;
-textInputClient.deleteBackward(length, (err: Error, result: boolean) => {
+textInputClient.deleteBackward(length, (err: BusinessError, result: boolean) => {
   if (err) {
     console.error(`Failed to deleteBackward: ${JSON.stringify(err)}`);
     return;
@@ -3349,7 +3349,7 @@ textInputClient.deleteBackward(length).then((result: boolean) => {
   } else {
     console.error('Failed to deleteBackward.');
   }
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to deleteBackward: ${JSON.stringify(err)}`);
 });
 ```
@@ -3376,7 +3376,7 @@ sendKeyFunction(action: number, callback: AsyncCallback&lt;boolean&gt;): void
 
 ```ts
 let action = 1;
-textInputClient.sendKeyFunction(action, (err: Error, result: boolean) => {
+textInputClient.sendKeyFunction(action, (err: BusinessError, result: boolean) => {
   if (err) {
     console.error(`Failed to sendKeyFunction: ${JSON.stringify(err)}`);
     return;
@@ -3423,7 +3423,7 @@ textInputClient.sendKeyFunction(action).then((result: boolean) => {
   } else {
     console.error('Failed to sendKeyFunction.');
   }
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to sendKeyFunction: ${JSON.stringify(err)}`);
 });
 ```
@@ -3450,7 +3450,7 @@ insertText(text:string, callback: AsyncCallback&lt;boolean&gt;): void
 **示例：**
 
 ```ts
-textInputClient.insertText('test', (err: Error, result: boolean) => {
+textInputClient.insertText('test', (err: BusinessError, result: boolean) => {
   if (err) {
     console.error(`Failed to insertText: ${JSON.stringify(err)}`);
     return;
@@ -3496,7 +3496,7 @@ textInputClient.insertText('test').then((result: boolean) => {
   } else {
     console.error('Failed to insertText.');
   }
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to insertText: ${JSON.stringify(err)}`);
 });
 ```
@@ -3522,7 +3522,7 @@ getEditorAttribute(callback: AsyncCallback&lt;EditorAttribute&gt;): void
 **示例：**
 
 ```ts
-textInputClient.getEditorAttribute((err: Error, editorAttribute: inputMethodEngine.EditorAttribute) => {
+textInputClient.getEditorAttribute((err: BusinessError, editorAttribute: inputMethodEngine.EditorAttribute) => {
   if (err) {
     console.error(`Failed to getEditorAttribute: ${JSON.stringify(err)}`);
     return;
@@ -3556,7 +3556,7 @@ getEditorAttribute(): Promise&lt;EditorAttribute&gt;
 textInputClient.getEditorAttribute().then((editorAttribute: inputMethodEngine.EditorAttribute) => {
   console.log('editorAttribute.inputPattern: ' + JSON.stringify(editorAttribute.inputPattern));
   console.log('editorAttribute.enterKeyType: ' + JSON.stringify(editorAttribute.enterKeyType));
-}).catch((err: Error) => {
+}).catch((err: BusinessError) => {
   console.error(`Failed to getEditorAttribute: ${JSON.stringify(err)}`);
 });
 ```
diff --git a/zh-cn/application-dev/reference/apis/js-apis-request.md b/zh-cn/application-dev/reference/apis/js-apis-request.md
index a90f3503a1b626b9e877fcbffd4d65ebb1e89a8e..675c5eeac1fa08ad67767dbcf43b4011b0c02988 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-request.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-request.md
@@ -103,10 +103,9 @@ uploadFile(context: BaseContext, config: UploadConfig): Promise&lt;UploadTask&gt
 
 **示例：**
 
-  ```js
-  let uploadTask;
-  let context;
-  let uploadConfig = {
+  ```ts
+  let uploadTask: request.UploadTask;
+  let uploadConfig: request.UploadConfig = {
     url: 'http://patch',
     header: { key1: "value1", key2: "value2" },
     method: "POST",
@@ -114,13 +113,13 @@ uploadFile(context: BaseContext, config: UploadConfig): Promise&lt;UploadTask&gt
     data: [{ name: "name123", value: "123" }],
   };
   try {
-    request.uploadFile(context, uploadConfig).then((data) => {
+    request.uploadFile(this.context, uploadConfig).then((data: request.UploadTask) => {
       uploadTask = data;
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to request the upload. Code: ${err.code}, message: ${err.message}`);
     });
   } catch (err) {
-    console.error(`Failed to request the upload. Code: ${err.code}, message: ${err.message}`);
+    console.error(`Failed to request the upload. err: ${JSON.stringify(err)}`);
   }
   ```
 
@@ -157,10 +156,9 @@ uploadFile(context: BaseContext, config: UploadConfig, callback: AsyncCallback&l
 
 **示例：**
 
-  ```js
-  let uploadTask;
-  let context;
-  let uploadConfig = {
+  ```ts
+  let uploadTask: request.UploadTask;
+  let uploadConfig: request.UploadConfig = {
     url: 'http://patch',
     header: { key1: "value1", key2: "value2" },
     method: "POST",
@@ -168,7 +166,7 @@ uploadFile(context: BaseContext, config: UploadConfig, callback: AsyncCallback&l
     data: [{ name: "name123", value: "123" }],
   };
   try {
-    request.uploadFile(context, uploadConfig, (err, data) => {
+    request.uploadFile(this.context, uploadConfig, (err: BusinessError, data: request.UploadTask) => {
       if (err) {
         console.error(`Failed to request the upload. Code: ${err.code}, message: ${err.message}`);
         return;
@@ -176,7 +174,7 @@ uploadFile(context: BaseContext, config: UploadConfig, callback: AsyncCallback&l
       uploadTask = data;
     });
   } catch (err) {
-    console.error(`Failed to request the upload. Code: ${err.code}, message: ${err.message}`);
+    console.error(`Failed to request the upload. err: ${JSON.stringify(err)}`);
   }
   ```
 
@@ -306,8 +304,8 @@ on(type: 'progress', callback:(uploadedSize: number, totalSize: number) =&gt; vo
 
 **示例：**
 
-  ```js
-  let upProgressCallback = (uploadedSize, totalSize) => {
+  ```ts
+  let upProgressCallback = (uploadedSize: number, totalSize: number) => {
     console.info("upload totalSize:" + totalSize + "  uploadedSize:" + uploadedSize);
   };
   uploadTask.on('progress', upProgressCallback);
@@ -339,8 +337,8 @@ on(type: 'headerReceive', callback:  (header: object) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let headerCallback = (headers) => {
+  ```ts
+  let headerCallback = (headers: object) => {
     console.info("upOnHeader headers:" + JSON.stringify(headers));
   };
   uploadTask.on('headerReceive', headerCallback);
@@ -372,16 +370,16 @@ on(type: 'headerReceive', callback:  (header: object) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let upCompleteCallback = (taskStates) => {
-    for (let i = 0; i < taskStates.length; i++ ) {
+  ```ts
+  let upCompleteCallback = (taskStates: Array<request.TaskState>) => {
+    for (let i = 0; i < taskStates.length; i++) {
       console.info("upOnComplete taskState:" + JSON.stringify(taskStates[i]));
     }
   };
   uploadTask.on('complete', upCompleteCallback);
 
-  let upFailCallback = (taskStates) => {
-    for (let i = 0; i < taskStates.length; i++ ) {
+  let upFailCallback = (taskStates: Array<request.TaskState>) => {
+    for (let i = 0; i < taskStates.length; i++) {
       console.info("upOnFail taskState:" + JSON.stringify(taskStates[i]));
     }
   };
@@ -408,8 +406,8 @@ off(type:  'progress',  callback?: (uploadedSize: number, totalSize: number) =&g
 
 **示例：**
 
-  ```js
-  let upProgressCallback = (uploadedSize, totalSize) => {
+  ```ts
+  let upProgressCallback = (uploadedSize: number, totalSize: number) => {
     console.info('Upload delete progress notification.' + 'totalSize:' + totalSize + 'uploadedSize:' + uploadedSize);
   };
   uploadTask.off('progress', upProgressCallback);
@@ -435,8 +433,8 @@ off(type: 'headerReceive', callback?: (header: object) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let headerCallback = (header) => {
+  ```ts
+  let headerCallback = (header: object) => {
     console.info(`Upload delete headerReceive notification. header: ${JSON.stringify(header)}`);
   };
   uploadTask.off('headerReceive', headerCallback);
@@ -461,18 +459,18 @@ off(type: 'headerReceive', callback?: (header: object) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let upCompleteCallback = (taskStates) => {
+  ```ts
+  let upCompleteCallback = (taskStates: Array<request.TaskState>) => {
     console.info('Upload delete complete notification.');
-    for (let i = 0; i < taskStates.length; i++ ) {
+    for (let i = 0; i < taskStates.length; i++) {
       console.info('taskState:' + JSON.stringify(taskStates[i]));
     }
   };
   uploadTask.off('complete', upCompleteCallback);
 
-  let upFailCallback = (taskStates) => {
+  let upFailCallback = (taskStates: Array<request.TaskState>) => {
     console.info('Upload delete fail notification.');
-    for (let i = 0; i < taskStates.length; i++ ) {
+    for (let i = 0; i < taskStates.length; i++) {
       console.info('taskState:' + JSON.stringify(taskStates[i]));
     }
   };
@@ -496,10 +494,10 @@ delete(): Promise&lt;boolean&gt;
 
 **示例：**
 
-  ```js
-  uploadTask.delete().then((result) => {
+  ```ts
+  uploadTask.delete().then((result: boolean) => {
     console.info('Succeeded in deleting the upload task.');
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to delete the upload task. Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -523,8 +521,8 @@ delete(callback: AsyncCallback&lt;boolean&gt;): void
 
 **示例：**
 
-  ```js
-  uploadTask.delete((err, result) => {
+  ```ts
+  uploadTask.delete((err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to delete the upload task. Code: ${err.code}, message: ${err.message}`);
       return;
@@ -688,17 +686,16 @@ downloadFile(context: BaseContext, config: DownloadConfig): Promise&lt;DownloadT
 
 **示例：**
 
-  ```js
-  let downloadTask;
-  let context;
+  ```ts
+  let downloadTask: request.DownloadTask;
   try {
-    request.downloadFile(context, { url: 'https://xxxx/xxxx.hap' }).then((data) => {
+    request.downloadFile(this.context, { url: 'https://xxxx/xxxx.hap' }).then((data: request.DownloadTask) => {
       downloadTask = data;
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to request the download. Code: ${err.code}, message: ${err.message}`);
     })
   } catch (err) {
-    console.error(`Failed to request the download. Code: ${err.code}, message: ${err.message}`);
+    console.error(`Failed to request the download. err: ${JSON.stringify(err)}`);
   }
   ```
 
@@ -738,12 +735,13 @@ downloadFile(context: BaseContext, config: DownloadConfig, callback: AsyncCallba
 
 **示例：**
 
-  ```js
-  let downloadTask;
-  let context;
+  ```ts
+  let downloadTask: request.DownloadTask;
   try {
-    request.downloadFile(context, { url: 'https://xxxx/xxxxx.hap', 
-    filePath: 'xxx/xxxxx.hap'}, (err, data) => {
+    request.downloadFile(this.context, {
+      url: 'https://xxxx/xxxxx.hap',
+      filePath: 'xxx/xxxxx.hap'
+    }, (err: BusinessError, data: request.DownloadTask) => {
       if (err) {
         console.error(`Failed to request the download. Code: ${err.code}, message: ${err.message}`);
         return;
@@ -751,7 +749,7 @@ downloadFile(context: BaseContext, config: DownloadConfig, callback: AsyncCallba
       downloadTask = data;
     });
   } catch (err) {
-    console.error(`Failed to request the download. Code: ${err.code}, message: ${err.message}`);
+    console.error(`Failed to request the download. err: ${JSON.stringify(err)}`);
   }
   ```
 
@@ -867,8 +865,8 @@ on(type: 'progress', callback:(receivedSize: number, totalSize: number) =&gt; vo
 
 **示例：**
 
-  ```js
-  let progresCallback = (receivedSize, totalSize) => {
+  ```ts
+  let progresCallback = (receivedSize: number, totalSize: number) => {
     console.info("download receivedSize:" + receivedSize + " totalSize:" + totalSize);
   };
   downloadTask.on('progress', progresCallback);
@@ -894,8 +892,8 @@ off(type: 'progress', callback?: (receivedSize: number, totalSize: number) =&gt;
 
 **示例：**
 
-  ```js
-  let progresCallback = (receivedSize, totalSize) => {
+  ```ts
+  let progresCallback = (receivedSize: number, totalSize: number) => {
     console.info('Download delete progress notification.' + 'receivedSize:' + receivedSize + 'totalSize:' + totalSize);
   };
   downloadTask.off('progress', progresCallback);
@@ -921,7 +919,7 @@ on(type: 'complete'|'pause'|'remove', callback:() =&gt; void): void
 
 **示例：**
 
-  ```js
+  ```ts
   let completeCallback = () => {
     console.info('Download task completed.');
   };
@@ -958,7 +956,7 @@ off(type: 'complete'|'pause'|'remove', callback?:() =&gt; void): void
 
 **示例：**
 
-  ```js
+  ```ts
   let completeCallback = () => {
     console.info('Download delete complete notification.');
   };
@@ -1001,8 +999,8 @@ on(type: 'fail', callback: (err: number) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let failCallback = (err) => {
+  ```ts
+  let failCallback = (err: BusinessError) => {
     console.error(`Failed to download the task. Code: ${err.code}, message: ${err.message}`);
   };
   downloadTask.on('fail', failCallback);
@@ -1028,8 +1026,8 @@ off(type: 'fail', callback?: (err: number) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let failCallback = (err) => {
+  ```ts
+  let failCallback = (err: BusinessError) => {
     console.error(`Failed to download the task. Code: ${err.code}, message: ${err.message}`);
   };
   downloadTask.off('fail', failCallback);
@@ -1053,10 +1051,10 @@ delete(): Promise&lt;boolean&gt;
 
 **示例：**
 
-  ```js
-  downloadTask.delete().then((result) => {
+  ```ts
+  downloadTask.delete().then((result: boolean) => {
     console.info('Succeeded in removing the download task.');
-  }).catch ((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to remove the download task. Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -1080,12 +1078,12 @@ delete(callback: AsyncCallback&lt;boolean&gt;): void
 
 **示例：**
 
-  ```js
-  downloadTask.delete((err, result)=>{
-    if(err) {
+  ```ts
+  downloadTask.delete((err: BusinessError, result: boolean) => {
+    if (err) {
       console.error(`Failed to remove the download task. Code: ${err.code}, message: ${err.message}`);
       return;
-    } 
+    }
     console.info('Succeeded in removing the download task.');
   });
   ```
@@ -1109,10 +1107,10 @@ getTaskInfo(): Promise&lt;DownloadInfo&gt;
 
 **示例：**
 
-  ```js
-  downloadTask.getTaskInfo().then((downloadInfo) => {    
+  ```ts
+  downloadTask.getTaskInfo().then((downloadInfo: request.DownloadInfo) => {
     console.info('Succeeded in querying the download task')
-  }) .catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to query the download task. Code: ${err.code}, message: ${err.message}`)
   });
   ```
@@ -1136,9 +1134,9 @@ getTaskInfo(callback: AsyncCallback&lt;DownloadInfo&gt;): void
 
 **示例：**
 
-  ```js
-  downloadTask.getTaskInfo((err, downloadInfo)=>{
-    if(err) {
+  ```ts
+  downloadTask.getTaskInfo((err: BusinessError, downloadInfo: request.DownloadInfo) => {
+    if (err) {
       console.error(`Failed to query the download mimeType. Code: ${err.code}, message: ${err.message}`);
     } else {
       console.info('Succeeded in querying the download mimeType');
@@ -1165,10 +1163,10 @@ getTaskMimeType(): Promise&lt;string&gt;
 
 **示例：**
 
-  ```js
-  downloadTask.getTaskMimeType().then((data) => {    
+  ```ts
+  downloadTask.getTaskMimeType().then((data: string) => {
     console.info('Succeeded in querying the download MimeType');
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to query the download MimeType. Code: ${err.code}, message: ${err.message}`)
   });
   ```
@@ -1192,9 +1190,9 @@ getTaskMimeType(callback: AsyncCallback&lt;string&gt;): void;
 
 **示例：**
 
-  ```js
-  downloadTask.getTaskMimeType((err, data)=>{
-    if(err) {
+  ```ts
+  downloadTask.getTaskMimeType((err: BusinessError, data: string) => {
+    if (err) {
       console.error(`Failed to query the download mimeType. Code: ${err.code}, message: ${err.message}`);
     } else {
       console.info('Succeeded in querying the download mimeType');
@@ -1221,10 +1219,10 @@ suspend(): Promise&lt;boolean&gt;
 
 **示例：**
 
-  ```js
-  downloadTask.suspend().then((result) => {    
+  ```ts
+  downloadTask.suspend().then((result: boolean) => {
     console.info('Succeeded in pausing the download task.');
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to pause the download task. Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -1248,9 +1246,9 @@ suspend(callback: AsyncCallback&lt;boolean&gt;): void
 
 **示例：**
 
-  ```js
-  downloadTask.suspend((err, result)=>{
-    if(err) {
+  ```ts
+  downloadTask.suspend((err: BusinessError, result: boolean) => {
+    if (err) {
       console.error(`Failed to pause the download task. Code: ${err.code}, message: ${err.message}`);
       return;
     }
@@ -1277,10 +1275,10 @@ restore(): Promise&lt;boolean&gt;
 
 **示例：**
 
-  ```js
-  downloadTask.restore().then((result) => {
+  ```ts
+  downloadTask.restore().then((result: boolean) => {
     console.info('Succeeded in resuming the download task.')
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to resume the download task. Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -1304,12 +1302,12 @@ restore(callback: AsyncCallback&lt;boolean&gt;): void
 
 **示例：**
 
-  ```js
-  downloadTask.restore((err, result)=>{
+  ```ts
+  downloadTask.restore((err: BusinessError, result: boolean) => {
     if (err) {
       console.error(`Failed to resume the download task. Code: ${err.code}, message: ${err.message}`);
       return;
-    } 
+    }
     console.info('Succeeded in resuming the download task.');
   });
   ```
@@ -1874,17 +1872,16 @@ on(event: 'progress', callback: (progress: Progress) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let context;
-  let attachments = [{
-                       name: "taskOnTest",
-                       value: {
-                         filename: "taskOnTest.avi",
-                         mimetype: "application/octet-stream",
-                         path: "./taskOnTest.avi",
-                       }
-                     }];
-  let config = {
+  ```ts
+  let attachments: Array<request.agent.FormItem> = [{
+    name: "taskOnTest",
+    value: {
+      filename: "taskOnTest.avi",
+      mimeType: "application/octet-stream",
+      path: "./taskOnTest.avi",
+    }
+  }];
+  let config: request.agent.Config = {
     action: request.agent.Action.UPLOAD,
     url: 'http://127.0.0.1',
     title: 'taskOnTest',
@@ -1906,13 +1903,13 @@ on(event: 'progress', callback: (progress: Progress) =&gt; void): void
     precise: false,
     token: "it is a secret"
   };
-  let createOnCallback = (progress) => {
-    console.info('upload task completed.');
+  let createOnCallback = (progress: request.agent.Progress) => {
+    console.info('upload task progress.');
   };
-  request.agent.create(context, config).then((task)=> {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.on('progress', createOnCallback);
     console.info(`Succeeded in creating a upload task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a upload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -1946,17 +1943,16 @@ on(event: 'completed', callback: (progress: Progress) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let context;
-  let attachments = [{
-                       name: "taskOnTest",
-                       value: {
-                         filename: "taskOnTest.avi",
-                         mimetype: "application/octet-stream",
-                         path: "./taskOnTest.avi",
-                       }
-                     }];
-  let config = {
+  ```ts
+  let attachments: Array<request.agent.FormItem> = [{
+    name: "taskOnTest",
+    value: {
+      filename: "taskOnTest.avi",
+      mimeType: "application/octet-stream",
+      path: "./taskOnTest.avi",
+    }
+  }];
+  let config: request.agent.Config = {
     action: request.agent.Action.UPLOAD,
     url: 'http://127.0.0.1',
     title: 'taskOnTest',
@@ -1978,13 +1974,13 @@ on(event: 'completed', callback: (progress: Progress) =&gt; void): void
     precise: false,
     token: "it is a secret"
   };
-  let createOnCallback = (progress) => {
+  let createOnCallback = (progress: request.agent.Progress) => {
     console.info('upload task completed.');
   };
-  request.agent.create(context, config).then((task)=> {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.on('completed', createOnCallback);
     console.info(`Succeeded in creating a upload task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a upload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2018,17 +2014,16 @@ on(event: 'failed', callback: (progress: Progress) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let context;
-  let attachments = [{
-                       name: "taskOnTest",
-                       value: {
-                         filename: "taskOnTest.avi",
-                         mimetype: "application/octet-stream",
-                         path: "./taskOnTest.avi",
-                       }
-                     }];
-  let config = {
+  ```ts
+  let attachments: Array<request.agent.FormItem> = [{
+    name: "taskOnTest",
+    value: {
+      filename: "taskOnTest.avi",
+      mimeType: "application/octet-stream",
+      path: "./taskOnTest.avi",
+    }
+  }];
+  let config: request.agent.Config = {
     action: request.agent.Action.UPLOAD,
     url: 'http://127.0.0.1',
     title: 'taskOnTest',
@@ -2050,13 +2045,13 @@ on(event: 'failed', callback: (progress: Progress) =&gt; void): void
     precise: false,
     token: "it is a secret"
   };
-  let createOnCallback = (progress) => {
-    console.info('upload task completed.');
+  let createOnCallback = (progress: request.agent.Progress) => {
+    console.info('upload task failed.');
   };
-  request.agent.create(context, config).then((task)=> {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.on('failed', createOnCallback);
     console.info(`Succeeded in creating a upload task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a upload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2091,17 +2086,16 @@ off(event: 'progress', callback?: (progress: Progress) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let context;
-  let attachments = [{
-                       name: "taskOffTest",
-                       value: {
-                         filename: "taskOffTest.avi",
-                         mimetype: "application/octet-stream",
-                         path: "./taskOffTest.avi",
-                       }
-                     }];
-  let config = {
+  ```ts
+  let attachments: Array<request.agent.FormItem> = [{
+    name: "taskOffTest",
+    value: {
+      filename: "taskOffTest.avi",
+      mimeType: "application/octet-stream",
+      path: "./taskOffTest.avi",
+    }
+  }];
+  let config: request.agent.Config = {
     action: request.agent.Action.UPLOAD,
     url: 'http://127.0.0.1',
     title: 'taskOffTest',
@@ -2123,14 +2117,14 @@ off(event: 'progress', callback?: (progress: Progress) =&gt; void): void
     precise: false,
     token: "it is a secret"
   };
-  let createOffCallback = (progress) => {
-    console.info('upload task completed.');
+  let createOffCallback = (progress: request.agent.Progress) => {
+    console.info('upload task progress.');
   };
-  request.agent.create(context, config).then((task)=> {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.on('progress', createOffCallback);
     task.off('progress', createOffCallback);
     console.info(`Succeeded in creating a upload task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a upload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2164,17 +2158,16 @@ off(event: 'completed', callback?: (progress: Progress) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let context;
-  let attachments = [{
-                       name: "taskOffTest",
-                       value: {
-                         filename: "taskOffTest.avi",
-                         mimetype: "application/octet-stream",
-                         path: "./taskOffTest.avi",
-                       }
-                     }];
-  let config = {
+  ```ts
+  let attachments: Array<request.agent.FormItem> = [{
+    name: "taskOffTest",
+    value: {
+      filename: "taskOffTest.avi",
+      mimeType: "application/octet-stream",
+      path: "./taskOffTest.avi",
+    }
+  }];
+  let config: request.agent.Config = {
     action: request.agent.Action.UPLOAD,
     url: 'http://127.0.0.1',
     title: 'taskOffTest',
@@ -2196,14 +2189,14 @@ off(event: 'completed', callback?: (progress: Progress) =&gt; void): void
     precise: false,
     token: "it is a secret"
   };
-  let createOffCallback = (progress) => {
+  let createOffCallback = (progress: request.agent.Progress) => {
     console.info('upload task completed.');
   };
-  request.agent.create(context, config).then((task)=> {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.on('completed', createOffCallback);
     task.off('completed', createOffCallback);
     console.info(`Succeeded in creating a upload task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a upload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2237,17 +2230,16 @@ off(event: 'failed', callback?: (progress: Progress) =&gt; void): void
 
 **示例：**
 
-  ```js
-  let context;
-  let attachments = [{
-                       name: "taskOffTest",
-                       value: {
-                         filename: "taskOffTest.avi",
-                         mimetype: "application/octet-stream",
-                         path: "./taskOffTest.avi",
-                       }
-                     }];
-  let config = {
+  ```ts
+  let attachments: Array<request.agent.FormItem> = [{
+    name: "taskOffTest",
+    value: {
+      filename: "taskOffTest.avi",
+      mimeType: "application/octet-stream",
+      path: "./taskOffTest.avi",
+    }
+  }];
+  let config: request.agent.Config = {
     action: request.agent.Action.UPLOAD,
     url: 'http://127.0.0.1',
     title: 'taskOffTest',
@@ -2269,14 +2261,14 @@ off(event: 'failed', callback?: (progress: Progress) =&gt; void): void
     precise: false,
     token: "it is a secret"
   };
-  let createOffCallback = (progress) => {
-    console.info('upload task completed.');
+  let createOffCallback = (progress: request.agent.Progress) => {
+    console.info('upload task failed.');
   };
-  request.agent.create(context, config).then((task)=> {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.on('failed', createOffCallback);
     task.off('failed', createOffCallback);
     console.info(`Succeeded in creating a upload task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a upload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2312,9 +2304,8 @@ start(callback: AsyncCallback&lt;void&gt;): void
 
 **示例：**
 
-  ```js
-  let context;
-  let config = {
+  ```ts
+  let config: request.agent.Config = {
     action: request.agent.Action.DOWNLOAD,
     url: 'http://127.0.0.1',
     title: 'taskStartTest',
@@ -2336,8 +2327,8 @@ start(callback: AsyncCallback&lt;void&gt;): void
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task) => {
-    task.start((err) => {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
+    task.start((err: BusinessError) => {
       if (err) {
         console.error(`Failed to start the download task, Code: ${err.code}, message: ${err.message}`);
         return;
@@ -2345,7 +2336,7 @@ start(callback: AsyncCallback&lt;void&gt;): void
       console.info(`Succeeded in starting a download task.`);
     });
     console.info(`Succeeded in creating a download task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2381,9 +2372,8 @@ start(): Promise&lt;void&gt;
 
 **示例：**
 
-  ```js
-  let context;
-  let config = {
+  ```ts
+  let config: request.agent.Config = {
     action: request.agent.Action.DOWNLOAD,
     url: 'http://127.0.0.1',
     title: 'taskStartTest',
@@ -2405,14 +2395,14 @@ start(): Promise&lt;void&gt;
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task) => {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.start().then(() => {
       console.info(`Succeeded in starting a download task.`);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to start the download task, Code: ${err.code}, message: ${err.message}`);
     });
     console.info(`Succeeded in creating a download task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2447,9 +2437,8 @@ pause(callback: AsyncCallback&lt;void&gt;): void
 
 **示例：**
 
-  ```js
-  let context;
-  let config = {
+  ```ts
+  let config: request.agent.Config = {
     action: request.agent.Action.DOWNLOAD,
     url: 'http://127.0.0.1',
     title: 'taskPauseTest',
@@ -2471,8 +2460,8 @@ pause(callback: AsyncCallback&lt;void&gt;): void
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task) => {
-    task.pause((err) => {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
+    task.pause((err: BusinessError) => {
       if (err) {
         console.error(`Failed to pause the download task, Code: ${err.code}, message: ${err.message}`);
         return;
@@ -2480,7 +2469,7 @@ pause(callback: AsyncCallback&lt;void&gt;): void
       console.info(`Succeeded in pausing a download task. `);
     });
     console.info(`Succeeded in creating a download task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2512,9 +2501,8 @@ pause(): Promise&lt;void&gt;
 
 **示例：**
 
-  ```js
-  let context;
-  let config = {
+  ```ts
+  let config: request.agent.Config = {
     action: request.agent.Action.DOWNLOAD,
     url: 'http://127.0.0.1',
     title: 'taskPauseTest',
@@ -2536,14 +2524,14 @@ pause(): Promise&lt;void&gt;
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task) => {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.pause().then(() => {
       console.info(`Succeeded in pausing a download task. `);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to pause the upload task, Code: ${err.code}, message: ${err.message}`);
     });
     console.info(`Succeeded in creating a download task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a upload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2577,9 +2565,8 @@ resume(callback: AsyncCallback&lt;void&gt;): void
 
 **示例：**
 
-  ```js
-  let context;
-  let config = {
+  ```ts
+  let config: request.agent.Config = {
     action: request.agent.Action.DOWNLOAD,
     url: 'http://127.0.0.1',
     title: 'taskResumeTest',
@@ -2601,8 +2588,8 @@ resume(callback: AsyncCallback&lt;void&gt;): void
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task) => {
-    task.resume((err) => {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
+    task.resume((err: BusinessError) => {
       if (err) {
         console.error(`Failed to resume the download task, Code: ${err.code}, message: ${err.message}`);
         return;
@@ -2610,7 +2597,7 @@ resume(callback: AsyncCallback&lt;void&gt;): void
       console.info(`Succeeded in resuming a download task. `);
     });
     console.info(`Succeeded in creating a download task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2644,9 +2631,8 @@ resume(): Promise&lt;void&gt;
 
 **示例：**
 
-  ```js
-  let context;
-  let config = {
+  ```ts
+  let config: request.agent.Config = {
     action: request.agent.Action.DOWNLOAD,
     url: 'http://127.0.0.1',
     title: 'taskResumeTest',
@@ -2668,14 +2654,14 @@ resume(): Promise&lt;void&gt;
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task) => {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.resume().then(() => {
       console.info(`Succeeded in resuming a download task. `);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to resume the download task, Code: ${err.code}, message: ${err.message}`);
     });
     console.info(`Succeeded in creating a download task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2706,9 +2692,8 @@ stop(callback: AsyncCallback&lt;void&gt;): void
 
 **示例：**
 
-  ```js
-  let context;
-  let config = {
+  ```ts
+  let config: request.agent.Config = {
     action: request.agent.Action.DOWNLOAD,
     url: 'http://127.0.0.1',
     title: 'taskStopTest',
@@ -2730,8 +2715,8 @@ stop(callback: AsyncCallback&lt;void&gt;): void
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task) => {
-    task.stop((err) => {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
+    task.stop((err: BusinessError) => {
       if (err) {
         console.error(`Failed to stop the download task, Code: ${err.code}, message: ${err.message}`);
         return;
@@ -2739,7 +2724,7 @@ stop(callback: AsyncCallback&lt;void&gt;): void
       console.info(`Succeeded in stopping a download task. `);
     });
     console.info(`Succeeded in creating a download task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2770,9 +2755,8 @@ stop(): Promise&lt;void&gt;
 
 **示例：**
 
-  ```js
-  let context;
-  let config = {
+  ```ts
+  let config: request.agent.Config = {
     action: request.agent.Action.DOWNLOAD,
     url: 'http://127.0.0.1',
     title: 'taskStopTest',
@@ -2794,14 +2778,14 @@ stop(): Promise&lt;void&gt;
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task) => {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     task.stop().then(() => {
       console.info(`Succeeded in stopping a download task. `);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to stop the download task, Code: ${err.code}, message: ${err.message}`);
     });
     console.info(`Succeeded in creating a download task. result: ${task.tid}`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -2838,17 +2822,16 @@ create(context: BaseContext, config: Config, callback: AsyncCallback&lt;Task&gt;
 
 **示例：**
 
-  ```js
-  let context;
-  let attachments = [{
-                       name: "reeateTest",
-                       value: {
-                         filename: "reeateTest.avi",
-                         mimetype: "application/octet-stream",
-                         path: "./reeateTest.avi",
-                       }
-                     }];
-  let config = {
+  ```ts
+  let attachments: Array<request.agent.FormItem> = [{
+    name: "reeateTest",
+    value: {
+      filename: "reeateTest.avi",
+      mimeType: "application/octet-stream",
+      path: "./reeateTest.avi",
+    }
+  }];
+  let config: request.agent.Config = {
     action: request.agent.Action.UPLOAD,
     url: 'http://127.0.0.1',
     title: 'reeateTest',
@@ -2870,7 +2853,7 @@ create(context: BaseContext, config: Config, callback: AsyncCallback&lt;Task&gt;
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config, (err, task) => {
+  request.agent.create(this.context, config, (err: BusinessError, task: request.agent.Task) => {
     if (err) {
       console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
       return;
@@ -2920,17 +2903,16 @@ create(context: BaseContext, config: Config): Promise&lt;Task&gt;
 
 **示例：**
 
-  ```js
-  let context;
-  let attachments = [{
-                       name: "reeateTest",
-                       value: {
-                         filename: "reeateTest.avi",
-                         mimetype: "application/octet-stream",
-                         path: "./reeateTest.avi",
-                       }
-                     }];
-  let config = {
+  ```ts
+  let attachments: Array<request.agent.FormItem> = [{
+    name: "reeateTest",
+    value: {
+      filename: "reeateTest.avi",
+      mimeType: "application/octet-stream",
+      path: "./reeateTest.avi",
+    }
+  }];
+  let config: request.agent.Config = {
     action: request.agent.Action.UPLOAD,
     url: 'http://127.0.0.1',
     title: 'reeateTest',
@@ -2952,7 +2934,7 @@ create(context: BaseContext, config: Config): Promise&lt;Task&gt;
     precise: false,
     token: "it is a secret"
   };
-  request.agent.create(context, config).then((task)=> {
+  request.agent.create(this.context, config).then((task: request.agent.Task) => {
     console.info(`Succeeded in creating a download task. result: ${task.config}`);
   }).catch((err) => {
     console.error(`Failed to create a download task, Code: ${err.code}, message: ${err.message}`);
@@ -2989,8 +2971,8 @@ remove(id: string, callback: AsyncCallback&lt;void&gt;): void
 
 **示例：**
 
-  ```js
-  request.agent.remove("id", (err) => {
+  ```ts
+  request.agent.remove("id", (err: BusinessError) => {
     if (err) {
       console.error(`Failed to removing a download task, Code: ${err.code}, message: ${err.message}`);
       return;
@@ -3031,10 +3013,10 @@ remove(id: string): Promise&lt;void&gt;
 
 **示例：**
 
-  ```js
+  ```ts
   request.agent.remove("id").then(() => {
     console.info(`Succeeded in removing a download task. `);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to remove a download task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -3065,8 +3047,8 @@ show(id: string, callback: AsyncCallback&lt;TaskInfo&gt;): void
 
 **示例：**
 
-  ```js
-  request.agent.show("123456", (err, TaskInfo) => {
+  ```ts
+  request.agent.show("123456", (err: BusinessError, taskInfo: request.agent.TaskInfo) => {
     if (err) {
       console.error(`Failed to show a unload task, Code: ${err.code}, message: ${err.message}`);
       return;
@@ -3106,10 +3088,10 @@ show(id: string): Promise&lt;TaskInfo&gt;
 
 **示例：**
 
-  ```js
-  request.agent.show("123456").then((TaskInfo) => {
+  ```ts
+  request.agent.show("123456").then((taskInfo: request.agent.TaskInfo) => {
     console.info(`Succeeded in showing a unload task.`);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to show a unload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -3141,8 +3123,8 @@ touch(id: string, token: string, callback: AsyncCallback&lt;TaskInfo&gt;): void
 
 **示例：**
 
-  ```js
-  request.agent.touch("123456", "token", (err, TaskInfo) => {
+  ```ts
+  request.agent.touch("123456", "token", (err: BusinessError, taskInfo: request.agent.TaskInfo) => {
     if (err) {
       console.error(`Failed to touch a unload task, Code: ${err.code}, message: ${err.message}`);
       return;
@@ -3183,10 +3165,10 @@ touch(id: string, token: string): Promise&lt;TaskInfo&gt;
 
 **示例：**
 
-  ```js
-  request.agent.touch("123456", "token").then((TaskInfo) => {
+  ```ts
+  request.agent.touch("123456", "token").then((taskInfo: request.agent.TaskInfo) => {
     console.info(`Succeeded in touching a unload task. `);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to touch a unload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -3216,13 +3198,13 @@ search(filter: Filter, callback: AsyncCallback&lt;Array&lt;string&gt;&gt;): void
 
 **示例：**
 
-  ```js
-  let filter ={
-    bundle:"com.example.myapplication",
+  ```ts
+  let filter: request.agent.Filter = {
+    bundle: "com.example.myapplication",
     action: request.agent.Action.UPLOAD,
-    mode:request.agent.Mode.BACKGROUND
+    mode: request.agent.Mode.BACKGROUND
   }
-  request.agent.search(filter, (err, data) => {
+  request.agent.search(filter, (err: BusinessError, data: Array<string>) => {
     if (err) {
       console.error(`Failed to search a unload task, Code: ${err.code}, message: ${err.message}`);
       return;
@@ -3261,15 +3243,15 @@ search(filter: Filter): Promise&lt;Array&lt;string&gt;&gt;
 
 **示例：**
 
-  ```js
-  let filter ={
-    bundle:"com.example.myapplication",
+  ```ts
+  let filter: request.agent.Filter = {
+    bundle: "com.example.myapplication",
     action: request.agent.Action.UPLOAD,
     mode: request.agent.Mode.BACKGROUND
   }
-  request.agent.search(filter).then((data) => {
+  request.agent.search(filter).then((data: Array<string>) => {
     console.info(`Succeeded in searching a unload task. `);
-  }).catch((err) => {
+  }).catch((err: BusinessError) => {
     console.error(`Failed to search a unload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```
@@ -3304,13 +3286,13 @@ query(id: string, callback: AsyncCallback&lt;TaskInfo&gt;): void
 
 **示例：**
 
-  ```js
-  request.agent.query("123456", (err, TaskInfo) => {
+  ```ts
+  request.agent.query("123456", (err: BusinessError, taskInfo: request.agent.TaskInfo) => {
     if (err) {
       console.error(`Failed to query a unload task, Code: ${err.code}, message: ${err.message}`);
       return;
     }
-    console.info(`Succeeded in querying a unload task. result: ${TaskInfo.uid}`);
+    console.info(`Succeeded in querying a unload task. result: ${taskInfo.uid}`);
   });
   ```
 
@@ -3349,10 +3331,10 @@ query(id: string): Promise&lt;TaskInfo&gt;
 
 **示例：**
 
-  ```js
-  request.agent.query("123456",).then((TaskInfo) => {
-    console.info(`Succeeded in querying a unload task. result: ${TaskInfo.uid}`);
-  }).catch((err) => {
+  ```ts
+  request.agent.query("123456",).then((taskInfo: request.agent.TaskInfo) => {
+    console.info(`Succeeded in querying a unload task. result: ${taskInfo.uid}`);
+  }).catch((err: BusinessError) => {
     console.error(`Failed to query a unload task, Code: ${err.code}, message: ${err.message}`);
   });
   ```