diff --git a/zh-cn/application-dev/database/data-persistence-by-preferences.md b/zh-cn/application-dev/database/data-persistence-by-preferences.md
index 8385bd06cfc8326bccb04c79e430018b2ff56730..c5a6f64a0c47e540aa14b3ca85f04d106db1ef7e 100644
--- a/zh-cn/application-dev/database/data-persistence-by-preferences.md
+++ b/zh-cn/application-dev/database/data-persistence-by-preferences.md
@@ -58,11 +58,13 @@
      
    ```js
    import UIAbility from '@ohos.app.ability.UIAbility';
+   import { BusinessError } from '@ohos.base';
+   import window from '@ohos.window';
    
    class EntryAbility extends UIAbility {
-     onWindowStageCreate(windowStage) {
+     onWindowStageCreate(windowStage: window.WindowStage) {
        try {
-         dataPreferences.getPreferences(this.context, 'mystore', (err, preferences) => {
+         dataPreferences.getPreferences(this.context, 'myStore', (err: BusinessError, preferences: dataPreferences.Preferences) => {
            if (err) {
              console.error(`Failed to get preferences. Code:${err.code},message:${err.message}`);
              return;
@@ -82,12 +84,13 @@
      
    ```js
    import featureAbility from '@ohos.ability.featureAbility';
+   import { BusinessError } from '@ohos.base';
    
    // 获取context
    let context = featureAbility.getContext();
    
    try {
-     dataPreferences.getPreferences(context, 'mystore', (err, preferences) => {
+     dataPreferences.getPreferences(this.context, 'myStore', (err: BusinessError, preferences: dataPreferences.Preferences) => {
        if (err) {
          console.error(`Failed to get preferences. Code:${err.code},message:${err.message}`);
          return;
@@ -157,7 +160,7 @@
      
    ```js
    try {
-     preferences.flush((err) => {
+     preferences.flush((err: BusinessError) => {
        if (err) {
          console.error(`Failed to flush. Code:${err.code}, message:${err.message}`);
          return;
@@ -174,18 +177,20 @@
      应用订阅数据变更需要指定observer作为回调方法。订阅的Key值发生变更后，当执行flush()方法时，observer被触发回调。示例代码如下所示：
      
    ```js
-   let observer = function (key) {
-     console.info('The key' + key + 'changed.');
+   interface observer {
+      key: string
    }
-   preferences.on('change', observer);
+   preferences.on('change', (key: observer) => {
+     console.info('The key' + key + 'changed.');
+   });
    // 数据产生变更，由'auto'变为'manual'
-   preferences.put('startup', 'manual', (err) => {
+   preferences.put('startup', 'manual', (err: BusinessError) => {
      if (err) {
        console.error(`Failed to put the value of 'startup'. Code:${err.code},message:${err.message}`);
        return;
      }
      console.info("Succeeded in putting the value of 'startup'.");
-     preferences.flush((err) => {
+     preferences.flush((err: BusinessError) => {
        if (err) {
          console.error(`Failed to flush. Code:${err.code}, message:${err.message}`);
          return;
@@ -210,7 +215,7 @@
      
    ```js
    try {
-     dataPreferences.deletePreferences(this.context, 'mystore', (err, val) => {
+     dataPreferences.deletePreferences(this.context, 'myStore', (err: BusinessError) => {
        if (err) {
          console.error(`Failed to delete preferences. Code:${err.code}, message:${err.message}`);
          return;
diff --git a/zh-cn/application-dev/database/data-sync-of-distributed-data-object.md b/zh-cn/application-dev/database/data-sync-of-distributed-data-object.md
index 4dd9be9bcc82e00fef53b5ad901e2582ccc18af7..8f3cca0be0fac2dc1ec8bb1e1d7738309c914d68 100644
--- a/zh-cn/application-dev/database/data-sync-of-distributed-data-object.md
+++ b/zh-cn/application-dev/database/data-sync-of-distributed-data-object.md
@@ -151,17 +151,26 @@
    // 导入模块
    import distributedDataObject from '@ohos.data.distributedDataObject';
    import UIAbility from '@ohos.app.ability.UIAbility';
-   
+   import { BusinessError } from '@ohos.base';
+   import window from '@ohos.window';
+
+   interface sourceObject{
+     name: string,
+     age: number,
+     isVis: boolean
+     parent: { [key: string]: string },
+     list: { [key: string]: string }[]
+   }
    class EntryAbility extends UIAbility {
-     onWindowStageCreate(windowStage) {
-       // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-       let localObject = distributedDataObject.create(this.context, {
+     onWindowStageCreate(windowStage: window.WindowStage) {
+       let source: sourceObject = {
          name: 'jack',
          age: 18,
          isVis: false,
          parent: { mother: 'jack mom', father: 'jack Dad' },
          list: [{ mother: 'jack mom' }, { father: 'jack Dad' }]
-       });
+       }
+       let localObject: distributedDataObject.DataObject = distributedDataObject.create(this.context, source);
      }
    }
    ```
@@ -175,34 +184,43 @@
    import featureAbility from '@ohos.ability.featureAbility';
    // 获取context
    let context = featureAbility.getContext();
-   // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-   let localObject = distributedDataObject.create(context, {
+   interface sourceObject{
+     name: string,
+     age: number,
+     isVis: boolean
+     parent: { [key: string]: string },
+     list: { [key: string]: string }[]
+   }
+   let source: sourceObject = {
      name: 'jack',
      age: 18,
      isVis: false,
      parent: { mother: 'jack mom', father: 'jack Dad' },
      list: [{ mother: 'jack mom' }, { father: 'jack Dad' }]
-   });
+   }
+   // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
+   let localObject: distributedDataObject.DataObject = distributedDataObject.create(context, source);
    ```
 
 4. 加入同步组网。同步组网中的数据对象分为发起方和被拉起方。
      
    ```js
    // 设备1加入sessionId
-   let sessionId = '123456';
+   let sessionId: string = '123456';
    
    localObject.setSessionId(sessionId);
    
    // 和设备1协同的设备2加入同一个session
    
    // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-   let remoteObject = distributedDataObject.create(this.context, {
+   let remoteSource: sourceObject = {
      name: undefined,
      age: undefined, //  undefined表示数据来自对端
      isVis: true,
      parent: undefined,
      list: undefined
-   });
+   }
+   let remoteObject: distributedDataObject.DataObject = distributedDataObject.create(this.context, remoteSource);
    // 收到status上线后remoteObject同步数据，即name变成jack,age是18
    remoteObject.setSessionId(sessionId);
    ```
@@ -210,18 +228,19 @@
 5. 监听对象数据变更。可监听对端数据的变更，以callback作为变更回调实例。
      
    ```js
-   function changeCallback(sessionId, changeData) {
-     console.info(`change: ${sessionId}`);
-   
-     if (changeData !== null && changeData !== undefined) {
-       changeData.forEach(element => {
-         console.info(`The element ${localObject[element]} changed.`);
-       });
-     }
+   interface ChangeCallback {
+     sessionId: string,
+     fields: Array<string> 
    }
    
-   // 发起方要在changeCallback里刷新界面，则需要将正确的this绑定给changeCallback
-   localObject.on("change", this.changeCallback.bind(this));
+   localObject.on("change", (changeData:ChangeCallback) => {
+     console.info("change" + changeData.sessionId);
+     if (changeData.fields != null && changeData.fields != undefined) {
+       for (let index: number = 0; index < changeData.fields.length; index++) {
+         console.info(`The element ${localObject[changeData.fields[index]]} changed.`);
+       }
+     }
+   });
    ```
 
 6. 修改对象属性，对象属性支持基本类型（数字类型、布尔类型、字符串类型）以及复杂类型（数组、基本类型嵌套等）。
@@ -256,7 +275,14 @@
      
    ```js
    // 删除变更回调changeCallback
-   localObject.off('change', this.changeCallback);
+   localObject.off('change',(changeData: ChangeCallback) => {
+     console.info("change" + changeData.sessionId);
+     if (changeData.fields != null && changeData.fields != undefined) {
+       for (let index: number = 0; index < changeData.fields.length; index++) {
+         console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+       }
+     }
+   });
    // 删除所有的变更回调
    localObject.off('change'); 
    ```
@@ -264,27 +290,32 @@
 9. 监听分布式数据对象的上下线。可以监听对端分布式数据对象的上下线。
      
    ```js
-   function statusCallback(sessionId, networkId, status) {
-     // 业务处理
+   interface onStatusCallback {
+     sessionId: string,
+     networkId: string,
+     status: 'online' | 'offline'
    }
    
-   localObject.on('status', this.statusCallback);
+   localObject.on('status', (statusCallback: onStatusCallback) => {
+     console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " +  statusCallback.networkId);
+     // 业务处理
+   });
    ```
 
 10. 保存和撤回已保存的数据对象。
      
     ```js
     // 保存数据对象，如果应用退出后组网内设备需要恢复对象数据时调用
-    localObject.save('local').then((result) => {
+    localObject.save("local").then((result: distributedDataObject.SaveSuccessResponse) => {
       console.info(`Succeeded in saving. SessionId:${result.sessionId},version:${result.version},deviceId:${result.deviceId}`);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to save. Code:${err.code},message:${err.message}`);
     });
    
     // 撤回保存的数据对象
-    localObject.revokeSave().then((result) => {
+    localObject.revokeSave().then((result: distributedDataObject.RevokeSaveSuccessResponse) => {
       console.info(`Succeeded in revokeSaving. Session:${result.sessionId}`);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to revokeSave. Code:${err.code},message:${err.message}`);
     });
     ```
@@ -292,8 +323,16 @@
 11. 删除监听分布式数据对象的上下线。可以指定删除监听的上下线回调；也可以不指定，这将会删除该分布式数据对象的所有上下线回调。
      
     ```js
+    interface offStatusCallback {
+      sessionId: string,
+      deviceId: string,
+      status: 'online' | 'offline'
+    }
     // 删除上下线回调statusCallback
-    localObject.off('status', this.statusCallback);
+    localObject.off('status', (statusCallback: offStatusCallback) => {
+      console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.deviceId);
+      // 业务处理
+    });
     // 删除所有的上下线回调
     localObject.off('status');
     ```
@@ -302,7 +341,7 @@
      
     ```js
     localObject.setSessionId(() => {
-        console.info('leave all lession.');
+      console.info('leave all session.');
     });
     ```
 
diff --git a/zh-cn/application-dev/reference/apis/js-apis-data-distributedobject.md b/zh-cn/application-dev/reference/apis/js-apis-data-distributedobject.md
index 26a3254206949582ceb3d71d253d2f14bc9e1b8c..4cc5b90e71aea7bb82123ba6b47ff0648ff2e756 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-data-distributedobject.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-data-distributedobject.md
@@ -42,10 +42,20 @@ FA模型示例：
 // 导入模块
 import distributedObject from '@ohos.data.distributedDataObject';
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base';
 // 获取context
 let context = featureAbility.getContext();
-// 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DataObject = distributedObject.create(context, source);
 ```
 
 Stage模型示例：
@@ -54,13 +64,23 @@ Stage模型示例：
 // 导入模块
 import distributedObject from '@ohos.data.distributedDataObject';
 import UIAbility from '@ohos.app.ability.UIAbility';
-
-let g_object = null;
-
+import { BusinessError } from '@ohos.base';
+import window from '@ohos.window';
+
+let g_object: distributedObject.DataObject = null;
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage){
-        // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-        g_object = distributedObject.create(this.context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+    onWindowStageCreate(windowStage: window.WindowStage) {
+        let source: sourceObject = {
+            name: "amy",
+            age:18,
+            isVis:false
+        }
+        g_object = distributedObject.create(this.context, source);
     }
 }
 ```
@@ -83,7 +103,7 @@ genSessionId(): string
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let sessionId = distributedObject.genSessionId();
+let sessionId: string = distributedObject.genSessionId();
 ```
 
 ## SaveSuccessResponse<sup>9+</sup>
@@ -179,7 +199,7 @@ g_object.setSessionId(distributedObject.genSessionId(), ()=>{
 });
 // 退出分布式组网
 g_object.setSessionId(() => {
-    console.info("leave all lession.");
+    console.info("leave all session.");
 });
 ```
 
@@ -219,13 +239,13 @@ setSessionId(sessionId?: string): Promise&lt;void&gt;
 // g_object加入分布式组网
 g_object.setSessionId(distributedObject.genSessionId()).then (()=>{
     console.info("join session.");
-    }).catch((error)=>{
+    }).catch((error: BusinessError)=>{
         console.info("error:" + error.code + error.message);
 });
 // 退出分布式组网
 g_object.setSessionId().then (()=>{
-    console.info("leave all lession.");
-    }).catch((error)=>{
+    console.info("leave all session.");
+    }).catch((error: BusinessError)=>{
         console.info("error:" + error.code + error.message);
 });
 ```
@@ -248,15 +268,18 @@ on(type: 'change', callback: Callback<{ sessionId: string, fields: Array&lt;stri
 **示例：**
 
 ```js
-globalThis.changeCallback = (sessionId, changeData) => {
-    console.info("change" + sessionId);
-    if (changeData != null && changeData != undefined) {
-        changeData.forEach(element => {
-        console.info("changed !" + element + " " + g_object[element]);
-        });
-    }
+interface ChangeCallback {
+  sessionId: string,
+  fields: Array<string>
 }
-g_object.on("change", globalThis.changeCallback);
+g_object.on("change", (changeData: ChangeCallback) => {
+    console.info("change" + changeData.sessionId);
+    if (changeData.fields != null && changeData.fields != undefined) {
+        for (let index: number = 0; index < changeData.fields.length; index++) {
+            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+        }
+    }
+});
 ```
 
 ### off('change')<sup>9+</sup>
@@ -279,7 +302,14 @@ off(type: 'change', callback?: Callback<{ sessionId: string, fields: Array&lt;st
 
 ```js
 // 删除数据变更回调changeCallback
-g_object.off("change", globalThis.changeCallback);
+g_object.off("change", (changeData:ChangeCallback) => {
+    console.info("change" + changeData.sessionId);
+    if (changeData.fields != null && changeData.fields != undefined) {
+        for (let index: number = 0; index < changeData.fields.length; index++) {
+            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+        }
+    }
+});
 // 删除所有的数据变更回调
 g_object.off("change");
 ```
@@ -302,10 +332,15 @@ on(type: 'status', callback: Callback<{ sessionId: string, networkId: string, st
 **示例：**
 
 ```js
-globalThis.statusCallback = (sessionId, networkId, status) => {
-    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+interface onStatusCallback {
+    sessionId: string,
+    networkId: string,
+    status: 'online' | 'offline'
 }
-g_object.on("status", globalThis.statusCallback);
+
+g_object.on("status", (statusCallback:onStatusCallback) => {
+    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
+});
 ```
 
 ### off('status')<sup>9+</sup>
@@ -327,11 +362,15 @@ off(type: 'status', callback?: Callback<{ sessionId: string, deviceId: string, s
 **示例：**
 
 ```js
-globalThis.statusCallback = (sessionId, networkId, status) => {
-    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+interface offStatusCallback {
+    sessionId: string,
+    networkId: string,
+    status: 'online' | 'offline'
 }
 // 删除上下线回调changeCallback
-g_object.off("status",globalThis.statusCallback);
+g_object.off("status", (statusCallback:StatusCallback) => {
+    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
+});
 // 删除所有的上下线回调
 g_object.off("status");
 ```
@@ -363,7 +402,7 @@ save(deviceId: string, callback: AsyncCallback&lt;SaveSuccessResponse&gt;): void
 
 ```ts
 g_object.setSessionId("123456");
-g_object.save("local", (err, result) => {
+g_object.save("local", (err: BusinessError, result:distributedObject.SaveSuccessResponse) => {
     if (err) {
         console.info("save failed, error code = " + err.code);
         console.info("save failed, error message: " + err.message);
@@ -408,12 +447,12 @@ save(deviceId: string): Promise&lt;SaveSuccessResponse&gt;
 
 ```js
 g_object.setSessionId("123456");
-g_object.save("local").then((result) => {
+g_object.save("local").then((result: distributedObject.SaveSuccessResponse) => {
     console.info("save callback");
     console.info("save sessionId " + result.sessionId);
     console.info("save version " + result.version);
     console.info("save deviceId " + result.deviceId);
-}).catch((err) => {
+}).catch((err: BusinessError) => {
     console.info("save failed, error code = " + err.code);
     console.info("save failed, error message: " + err.message);
 });
@@ -441,7 +480,7 @@ revokeSave(callback: AsyncCallback&lt;RevokeSaveSuccessResponse&gt;): void
 ```js
 g_object.setSessionId("123456");
 // 持久化数据
-g_object.save("local", (err, result) => {
+g_object.save("local", (err: BusinessError, result: distributedObject.SaveSuccessResponse) => {
     if (err) {
         console.info("save failed, error code = " + err.code);
         console.info("save failed, error message: " + err.message);
@@ -453,7 +492,7 @@ g_object.save("local", (err, result) => {
     console.info("save deviceId:  " + result.deviceId);
 });
 // 删除持久化保存的数据
-g_object.revokeSave((err, result) => {
+g_object.revokeSave((err: BusinessError, result: distributedObject.RevokeSaveSuccessResponse) => {
     if (err) {
       console.info("revokeSave failed, error code = " + err.code);
       console.info("revokeSave failed, error message: " + err.message);
@@ -486,20 +525,20 @@ revokeSave(): Promise&lt;RevokeSaveSuccessResponse&gt;
 ```ts
 g_object.setSessionId("123456");
 // 持久化数据
-g_object.save("local").then((result) => {
+g_object.save("local").then((result: distributedObject.SaveSuccessResponse) => {
     console.info("save callback");
     console.info("save sessionId " + result.sessionId);
     console.info("save version " + result.version);
     console.info("save deviceId " + result.deviceId);
-}).catch((err) => {
+}).catch((err: BusinessError) => {
     console.info("save failed, error code = " + err.code);
     console.info("save failed, error message: " + err.message);
 });
 // 删除持久化保存的数据
-g_object.revokeSave().then((result) => {
+g_object.revokeSave().then((result: distributedObject.RevokeSaveSuccessResponse) => {
     console.info("revokeSave callback");
     console.info("sessionId" + result.sessionId);
-}).catch((err)=> {
+}).catch((err: BusinessError)=> {
     console.info("revokeSave failed, error code = " + err.code);
     console.info("revokeSave failed, error message = " + err.message);
 });
@@ -534,8 +573,17 @@ createDistributedObject(source: object): DistributedObject
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-// 创建对象，对象包含4个属性类型，string,number,boolean和Object
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 ```
 
 ## DistributedObject<sup>(deprecated)</sup>
@@ -572,7 +620,17 @@ setSessionId(sessionId?: string): boolean
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});;
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 // g_object加入分布式组网
 g_object.setSessionId(distributedObject.genSessionId());
 // 设置为""退出分布式组网
@@ -602,16 +660,29 @@ on(type: 'change', callback: Callback<{ sessionId: string, fields: Array&lt;stri
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
-globalThis.changeCallback = (sessionId, changeData) => {
-    console.info("change" + sessionId);
-    if (changeData != null && changeData != undefined) {
-        changeData.forEach(element => {
-        console.info("changed !" + element + " " + g_object[element]);
-        });
-    }
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
 }
-g_object.on("change", globalThis.changeCallback);
+interface ChangeCallback {
+    sessionId: string,
+    fields: Array<string>
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
+g_object.on("change", (changeData:ChangeCallback) => {
+    console.info("change" + changeData.sessionId);
+    if (changeData.fields != null && changeData.fields != undefined) {
+        for (let index: number = 0; index < changeData.fields.length; index++) {
+            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+        }
+    }
+});
 ```
 
 ### off('change')<sup>(deprecated)</sup>
@@ -638,9 +709,30 @@ off(type: 'change', callback?: Callback<{ sessionId: string, fields: Array&lt;st
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+interface ChangeCallback {
+    sessionId: string,
+    fields: Array<string>
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 // 删除数据变更回调changeCallback
-g_object.off("change", globalThis.changeCallback);
+g_object.off("change", (changeData:ChangeCallback) => {
+    console.info("change" + changeData.sessionId);
+    if (changeData.fields != null && changeData.fields != undefined) {
+        for (let index: number = 0; index < changeData.fields.length; index++) {
+            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+        }
+    }
+});
 // 删除所有的数据变更回调
 g_object.off("change");
 ```
@@ -668,11 +760,27 @@ on(type: 'status', callback: Callback<{ sessionId: string, networkId: string, st
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-globalThis.statusCallback = (sessionId, networkId, status) => {
-    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+interface StatusCallback {
+    sessionId: string,
+    networkId: string,
+    status: 'online' | 'offline'
 }
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
-g_object.on("status", globalThis.statusCallback);
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
+
+g_object.on("status", (statusCallback:StatusCallback) => {
+    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
+});
 ```
 
 ### off('status')<sup>(deprecated)</sup>
@@ -699,12 +807,26 @@ off(type: 'status', callback?: Callback<{ sessionId: string, deviceId: string, s
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
-globalThis.statusCallback = (sessionId, networkId, status) => {
-    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+interface offStatusCallback {
+    sessionId: string,
+    deviceId: string,
+    status: 'online' | 'offline'
 }
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 // 删除上下线回调changeCallback
-g_object.off("status",globalThis.statusCallback);
+g_object.off("status", (statusCallback:offStatusCallback) => {
+    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.deviceId);
+});
 // 删除所有的上下线回调
 g_object.off("status");
 ```
diff --git a/zh-cn/application-dev/reference/apis/js-apis-data-preferences.md b/zh-cn/application-dev/reference/apis/js-apis-data-preferences.md
index 7b5075441c0fb2e06881530e4aaabc71d2a97c57..b9ea1bd0f99eafe3ea98bd3d49f2d7dee68422e6 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-data-preferences.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-data-preferences.md
@@ -49,11 +49,13 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base';
+
 let context = featureAbility.getContext();
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 
 try {
-    data_preferences.getPreferences(context, 'mystore', function (err, val) {
+    data_preferences.getPreferences(context, 'myStore', (err: BusinessError, val: data_preferences.Preferences) => {
         if (err) {
             console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
             return;
@@ -70,16 +72,18 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base';
+import window from '@ohos.window';
 
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            data_preferences.getPreferences(this.context, 'mystore', function (err, val) {
+            data_preferences.getPreferences(this.context, 'myStore', (err: BusinessError, val: data_preferences.Preferences) => {
                 if (err) {
-                    console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
-                    return;
+                console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+                return;
                 }
                 preferences = val;
                 console.info("Succeeded in getting preferences.");
@@ -119,15 +123,17 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
 
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 try {
-    let promise = data_preferences.getPreferences(context, 'mystore');
-    promise.then((object) => {
+    let promise = data_preferences.getPreferences(context, 'myStore');
+    promise.then((object: data_preferences.Preferences) => {
         preferences = object;
         console.info("Succeeded in getting preferences.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
     })
 } catch(err) {
@@ -139,17 +145,19 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            let promise = data_preferences.getPreferences(this.context, 'mystore');
-            promise.then((object) => {
+            let promise = data_preferences.getPreferences(this.context, 'myStore');
+            promise.then((object: data_preferences.Preferences) => {
                 preferences = object;
                 console.info("Succeeded in getting preferences.");
-            }).catch((err) => {
+            }).catch((err: BusinessError) => {
                 console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
             })
         } catch(err) {
@@ -191,11 +199,14 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 
 try {
-    data_preferences.getPreferences(context, { name: 'mystore' }, function (err, val) {
+    let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+    data_preferences.getPreferences(context, options, (err: BusinessError, val: data_preferences.Preferences) => {
         if (err) {
             console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
             return;
@@ -213,13 +224,16 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            data_preferences.getPreferences(this.context, { name: 'mystore', dataGroupId:'myId' }, function (err, val) {
+            let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+            data_preferences.getPreferences(this.context, options, (err: BusinessError, val: data_preferences.Preferences) => {
                 if (err) {
                     console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
                     return;
@@ -271,15 +285,17 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
 let context = featureAbility.getContext();
 
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 try {
-    let promise = data_preferences.getPreferences(context, { name: 'mystore' });
-    promise.then((object) => {
+    let options: data_preferences.Options =  { name: 'myStore' };
+    let promise = data_preferences.getPreferences(context, options);
+    promise.then((object: data_preferences.Preferences) => {
         preferences = object;
         console.info("Succeeded in getting preferences.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
     })
 } catch(err) {
@@ -291,17 +307,20 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            let promise = data_preferences.getPreferences(this.context, { name: 'mystore', dataGroupId:'myId' });
-            promise.then((object) => {
+            let options: data_preferences.Options =  { name: 'myStore', dataGroupId:'myId' };
+            let promise = data_preferences.getPreferences(this.context, options);
+            promise.then((object: data_preferences.Preferences) => {
                 preferences = object;
                 console.info("Succeeded in getting preferences.");
-            }).catch((err) => {
+            }).catch((err: BusinessError) => {
                 console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
             })
         } catch(err) {
@@ -348,11 +367,14 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
-let preferences = null;
+let preferences: data_preferences.Preferences = null;
 
 try {
-    preferences = data_preferences.getPreferencesSync(context, { name: 'mystore' });
+    let options: data_preferences.Options =  { name: 'myStore' };
+    preferences = data_preferences.getPreferencesSync(context, options);
 } catch(err) {
     console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
 }
@@ -362,12 +384,16 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
-let preferences = null;
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
+
+let preferences: data_preferences.Preferences = null;
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            preferences = data_preferences.getPreferencesSync(this.context, { name: 'mystore', dataGroupId:'myId' });
+            let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+            preferences = data_preferences.getPreferencesSync(this.context, options);
         } catch(err) {
             console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
         }
@@ -408,10 +434,12 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
 
 try {
-    data_preferences.deletePreferences(context, 'mystore', function (err) {
+    data_preferences.deletePreferences(context, 'myStore', (err: BusinessError) => {
         if (err) {
             console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
             return;
@@ -427,11 +455,13 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            data_preferences.deletePreferences(this.context, 'mystore', function (err) {
+            data_preferences.deletePreferences(this.context, 'myStore', (err: BusinessError) => {
                 if (err) {
                     console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
                     return;
@@ -483,13 +513,15 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
 
 try {
-    let promise = data_preferences.deletePreferences(context, 'mystore');
+    let promise = data_preferences.deletePreferences(context, 'myStore');
     promise.then(() => {
         console.info("Succeeded in deleting preferences.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
     })
 } catch(err) {
@@ -501,14 +533,16 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try{
-            let promise = data_preferences.deletePreferences(this.context, 'mystore');
+            let promise = data_preferences.deletePreferences(this.context, 'myStore');
             promise.then(() => {
                 console.info("Succeeded in deleting preferences.");
-            }).catch((err) => {
+            }).catch((err: BusinessError) => {
                 console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
             })
         } catch(err) {
@@ -553,10 +587,13 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
 
 try {
-    data_preferences.deletePreferences(context, { name: 'mystore' }, function (err) {
+    let options: data_preferences.Options = { name: 'myStore' };
+    data_preferences.deletePreferences(context, options, (err: BusinessError) => {
         if (err) {
             console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
             return;
@@ -572,11 +609,14 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            data_preferences.deletePreferences(this.context, { name: 'mystore', dataGroupId:'myId' }, function (err) {
+            let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+            data_preferences.deletePreferences(this.context, options, (err: BusinessError) => {
                 if (err) {
                     console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
                     return;
@@ -631,13 +671,16 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
 
 try {
-    let promise = data_preferences.deletePreferences(context, { name: 'mystore' });
+    let options: data_preferences.Options = { name: 'myStore' };
+    let promise = data_preferences.deletePreferences(context, options);
     promise.then(() => {
         console.info("Succeeded in deleting preferences.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
     })
 } catch(err) {
@@ -649,14 +692,17 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try{
-            let promise = data_preferences.deletePreferences(this.context, { name: 'mystore', dataGroupId:'myId' });
+            let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+            let promise = data_preferences.deletePreferences(this.context, options);
             promise.then(() => {
                 console.info("Succeeded in deleting preferences.");
-            }).catch((err) => {
+            }).catch((err: BusinessError) => {
                 console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
             })
         } catch(err) {
@@ -694,9 +740,11 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
 try {
-    data_preferences.removePreferencesFromCache(context, 'mystore', function (err) {
+    data_preferences.removePreferencesFromCache(context, 'myStore', (err: BusinessError) => {
         if (err) {
             console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
             return;
@@ -712,11 +760,13 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            data_preferences.removePreferencesFromCache(this.context, 'mystore', function (err) {
+            data_preferences.removePreferencesFromCache(this.context, 'myStore', (err: BusinessError) => {
                 if (err) {
                     console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
                     return;
@@ -762,12 +812,14 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
+
 let context = featureAbility.getContext();
 try {
-    let promise = data_preferences.removePreferencesFromCache(context, 'mystore');
+    let promise = data_preferences.removePreferencesFromCache(context, 'myStore');
     promise.then(() => {
         console.info("Succeeded in removing preferences.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
     })
 } catch(err) {
@@ -779,14 +831,16 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            let promise = data_preferences.removePreferencesFromCache(this.context, 'mystore');
+            let promise = data_preferences.removePreferencesFromCache(this.context, 'myStore');
             promise.then(() => {
                 console.info("Succeeded in removing preferences.");
-            }).catch((err) => {
+            }).catch((err: BusinessError) => {
                 console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
             })
         } catch(err) {
@@ -824,7 +878,7 @@ FA模型示例：
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 try {
-    data_preferences.removePreferencesFromCacheSync(context, 'mystore');
+    data_preferences.removePreferencesFromCacheSync(context, 'myStore');
 } catch(err) {
     console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
 }
@@ -836,9 +890,9 @@ Stage模型示例：
 import UIAbility from '@ohos.app.ability.UIAbility';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            data_preferences.removePreferencesFromCacheSync(this.context, 'mystore');
+            data_preferences.removePreferencesFromCacheSync(this.context, 'myStore');
         } catch(err) {
             console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
         }
@@ -882,9 +936,11 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
 let context = featureAbility.getContext();
 try {
-    data_preferences.removePreferencesFromCache(context, { name: 'mystore' }, function (err) {
+    let options: data_preferences.Options = { name: 'myStore' };
+    data_preferences.removePreferencesFromCache(context, options, (err: BusinessError) => {
         if (err) {
             console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
             return;
@@ -900,11 +956,14 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            data_preferences.removePreferencesFromCache(this.context, { name: 'mystore', dataGroupId:'myId' }, function (err) {
+            let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+            data_preferences.removePreferencesFromCache(this.context, options, (err: BusinessError) => {
                 if (err) {
                     console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
                     return;
@@ -959,12 +1018,14 @@ FA模型示例：
 ```js
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base'
 let context = featureAbility.getContext();
 try {
-    let promise = data_preferences.removePreferencesFromCache(context, { name: 'mystore' });
+    let options: data_preferences.Options = { name: 'myStore' };
+    let promise = data_preferences.removePreferencesFromCache(context, options);
     promise.then(() => {
         console.info("Succeeded in removing preferences.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
     })
 } catch(err) {
@@ -976,14 +1037,17 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import { BusinessError } from '@ohos.base'
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            let promise = data_preferences.removePreferencesFromCache(this.context, { name: 'mystore', dataGroupId:'myId' });
+            let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+            let promise = data_preferences.removePreferencesFromCache(this.context, options);
             promise.then(() => {
                 console.info("Succeeded in removing preferences.");
-            }).catch((err) => {
+            }).catch((err: BusinessError) => {
                 console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
             })
         } catch(err) {
@@ -1030,7 +1094,8 @@ FA模型示例：
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 try {
-    data_preferences.removePreferencesFromCacheSync(context, { name: 'mystore' });
+    let options: data_preferences.Options = { name: 'myStore' };
+    data_preferences.removePreferencesFromCacheSync(context, options);
 } catch(err) {
     console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
 }
@@ -1040,11 +1105,13 @@ Stage模型示例：
 
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
+import window from '@ohos.window';
 
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage) {
+    onWindowStageCreate(windowStage: window.WindowStage) {
         try {
-            data_preferences.removePreferencesFromCacheSync(this.context, { name: 'mystore', dataGroupId:'myId' });
+            let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+            data_preferences.removePreferencesFromCacheSync(this.context, options);
         } catch(err) {
             console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
         }
@@ -1090,7 +1157,7 @@ get(key: string, defValue: ValueType, callback: AsyncCallback&lt;ValueType&gt;):
 
 ```js
 try {
-    preferences.get('startup', 'default', function (err, val) {
+    preferences.get('startup', 'default', (err: BusinessError, val: data_preferences.ValueType) => {
         if (err) {
             console.error("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message);
             return;
@@ -1129,9 +1196,9 @@ get(key: string, defValue: ValueType): Promise&lt;ValueType&gt;
 ```js
 try {
     let promise = preferences.get('startup', 'default');
-    promise.then((data) => {
+    promise.then((data: data_preferences.ValueType) => {
         console.info("Succeeded in getting value of 'startup'. Data: " + data);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message);
     })
 } catch(err) {
@@ -1164,7 +1231,7 @@ getSync(key: string, defValue: ValueType): ValueType
 
 ```js
 try {
-    let value = preferences.getSync('startup', 'default');
+    let value: data_preferences.ValueType = preferences.getSync('startup', 'default');
     console.info("Succeeded in getting value of 'startup'. Data: " + value);
 } catch(err) {
     console.error("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message);
@@ -1189,14 +1256,14 @@ getAll(callback: AsyncCallback&lt;Object&gt;): void;
 
 ```js
 try {
-    preferences.getAll(function (err, value) {
+    preferences.getAll((err: BusinessError, value: data_preferences.ValueType) => {
         if (err) {
             console.error("Failed to get all key-values. code =" + err.code + ", message =" + err.message);
             return;
         }
-    let allKeys = Object.keys(value);
-    console.info("getAll keys = " + allKeys);
-    console.info("getAll object = " + JSON.stringify(value));
+        let allKeys = Object.keys(value);
+        console.info("getAll keys = " + allKeys);
+        console.info("getAll object = " + JSON.stringify(value));
     })
 } catch (err) {
     console.error("Failed to get all key-values. code =" + err.code + ", message =" + err.message);
@@ -1223,11 +1290,11 @@ getAll(): Promise&lt;Object&gt;
 ```js
 try {
     let promise = preferences.getAll();
-    promise.then((value) => {
+    promise.then((value: data_preferences.ValueType) => {
         let allKeys = Object.keys(value);
         console.info('getAll keys = ' + allKeys);
         console.info("getAll object = " + JSON.stringify(value));
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to get all key-values. code =" + err.code + ", message =" + err.message);
     })
 } catch (err) {
@@ -1282,7 +1349,7 @@ put(key: string, value: ValueType, callback: AsyncCallback&lt;void&gt;): void
 
 ```js
 try {
-    preferences.put('startup', 'auto', function (err) {
+    preferences.put('startup', 'auto', (err: BusinessError) => {
         if (err) {
             console.error("Failed to put value of 'startup'. code =" + err.code + ", message =" + err.message);
             return;
@@ -1323,7 +1390,7 @@ try {
     let promise = preferences.put('startup', 'auto');
     promise.then(() => {
         console.info("Succeeded in putting value of 'startup'.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to put value of 'startup'. code =" + err.code +", message =" + err.message);
     })
 } catch(err) {
@@ -1377,7 +1444,7 @@ has(key: string, callback: AsyncCallback&lt;boolean&gt;): void
 
 ```js
 try {
-    preferences.has('startup', function (err, val) {
+    preferences.has('startup', (err: BusinessError, val: boolean) => {
         if (err) {
             console.error("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
             return;
@@ -1387,7 +1454,7 @@ try {
         } else {
             console.info("The key 'startup' dose not contain.");
         }
-  })
+    })
 } catch (err) {
     console.error("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
 }
@@ -1419,15 +1486,15 @@ has(key: string): Promise&lt;boolean&gt;
 ```js
 try {
     let promise = preferences.has('startup');
-    promise.then((val) => {
+    promise.then((val: boolean) => {
         if (val) {
             console.info("The key 'startup' is contained.");
         } else {
             console.info("The key 'startup' dose not contain.");
         }
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
-  })
+    })
 } catch(err) {
     console.error("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
 }
@@ -1458,7 +1525,7 @@ hasSync(key: string): boolean
 
 ```js
 try {
-    let isExist = preferences.hasSync('startup');
+    let isExist: boolean = preferences.hasSync('startup');
     if (isExist) {
         console.info("The key 'startup' is contained.");
     } else {
@@ -1489,7 +1556,7 @@ delete(key: string, callback: AsyncCallback&lt;void&gt;): void
 
 ```js
 try {
-    preferences.delete('startup', function (err) {
+    preferences.delete('startup', (err: BusinessError) => {
         if (err) {
             console.error("Failed to delete the key 'startup'. code =" + err.code + ", message =" + err.message);
             return;
@@ -1529,7 +1596,7 @@ try {
     let promise = preferences.delete('startup');
     promise.then(() => {
         console.info("Succeeded in deleting the key 'startup'.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
     })
 } catch(err) {
@@ -1581,7 +1648,7 @@ flush(callback: AsyncCallback&lt;void&gt;): void
 
 ```js
 try {
-    preferences.flush(function (err) {
+    preferences.flush((err: BusinessError) => {
         if (err) {
             console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
             return;
@@ -1615,7 +1682,7 @@ try {
     let promise = preferences.flush();
     promise.then(() => {
         console.info("Succeeded in flushing.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
     })
 } catch (err) {
@@ -1642,7 +1709,7 @@ clear(callback: AsyncCallback&lt;void&gt;): void
 
 ```js
 try {
-    preferences.clear(function (err) {
+    preferences.clear((err: BusinessError) =>{
         if (err) {
             console.error("Failed to clear. code =" + err.code + ", message =" + err.message);
             return;
@@ -1676,7 +1743,7 @@ try {
     let promise = preferences.clear();
     promise.then(() => {
         console.info("Succeeded in clearing.");
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
         console.error("Failed to clear. code =" + err.code + ", message =" + err.message);
     })
 } catch(err) {
@@ -1722,29 +1789,31 @@ on(type: 'change', callback: Callback&lt;{ key : string }&gt;): void
 **示例：**
 
 ```js
+interface observer {
+  key: string
+}
 try {
-    data_preferences.getPreferences(this.context, 'mystore', function (err, preferences) {
+    data_preferences.getPreferences(this.context, 'myStore', (err: BusinessError, preferences: data_preferences.Preferences) => {
         if (err) {
             console.error("Failed to get preferences.");
             return;
         }
-        let observer = function (key) {
+        preferences.on('change', (key: observer) => {
             console.info("The key " + key + " changed.");
-        }
-        preferences.on('change', observer);
-        preferences.put('startup', 'manual', function (err) {
+        });
+        preferences.put('startup', 'manual', (err: BusinessError) => {
             if (err) {
-                console.error("Failed to put the value of 'startup'. Cause: " + err);
-                return;
+            console.error("Failed to put the value of 'startup'. Cause: " + err);
+            return;
             }
             console.info("Succeeded in putting the value of 'startup'.");
 
-            preferences.flush(function (err) {
-                if (err) {
-                    console.error("Failed to flush. Cause: " + err);
-                    return;
-                }
-                console.info("Succeeded in flushing.");
+            preferences.flush((err: BusinessError) => {
+            if (err) {
+                console.error("Failed to flush. Cause: " + err);
+                return;
+            }
+            console.info("Succeeded in flushing.");
             })
         })
     })
@@ -1781,24 +1850,26 @@ on(type: 'multiProcessChange', callback: Callback&lt;{ key : string }&gt;): void
 **示例1：**
 
 ```js
+interface observer {
+  key: string
+}
 try {
-    data_preferences.getPreferences(this.context, { name: 'mystore', dataGroupId:'myId' }, function (err, preferences) {
+    let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+    data_preferences.getPreferences(this.context, options, (err: BusinessError, preferences: data_preferences.Preferences) => {
         if (err) {
             console.error("Failed to get preferences.");
             return;
         }
-        let observer = function (key) {
+        preferences.on('multiProcessChange', (key: observer) => {
             console.info("The key " + key + " changed.");
-        }
-        preferences.on('multiProcessChange', observer);
-        preferences.put('startup', 'manual', function (err) {
+        });
+        preferences.put('startup', 'manual', (err: BusinessError) => {
             if (err) {
                 console.error("Failed to put the value of 'startup'. Cause: " + err);
                 return;
             }
             console.info("Succeeded in putting the value of 'startup'.");
-
-            preferences.flush(function (err) {
+            preferences.flush((err: BusinessError) => {
                 if (err) {
                     console.error("Failed to flush. Cause: " + err);
                     return;
@@ -1815,17 +1886,21 @@ try {
 **示例2：**
 
 ```js
+interface observer {
+  key: string
+}
 try {
-    data_preferences.getPreferences(this.context, { name: 'mystore' }, function (err, val) {
+    let options: data_preferences.Options = { name: 'myStore' };
+    data_preferences.getPreferences(this.context, options, (err: BusinessError, val: data_preferences.Preferences) => {
         if (err) {
             console.error("Failed to get preferences.");
             return;
         }
         preferences = val;
-        let observer = function (key) {
+        preferences.on('multiProcessChange', (key: observer) => {
             console.info("The key " + key + " changed.");
             try {
-                data_preferences.removePreferencesFromCache(this.context, { name: 'mystore' }, function (err) {
+                data_preferences.removePreferencesFromCache(this.context, options, (err: BusinessError) => {
                     if (err) {
                         console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
                         return;
@@ -1838,7 +1913,7 @@ try {
             }
 
             try {
-                data_preferences.getPreferences(this.context, { name: 'mystore' }, function (err, val) {
+                data_preferences.getPreferences(this.context, options, (err: BusinessError, val: data_preferences.Preferences) => {
                     if (err) {
                         console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
                         return;
@@ -1849,16 +1924,15 @@ try {
             } catch (err) {
                 console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
             }
-        }
-        preferences.on('multiProcessChange', observer);
-        preferences.put('startup', 'manual', function (err) {
+        });
+        preferences.put('startup', 'manual', (err: BusinessError) => {
             if (err) {
                 console.error("Failed to put the value of 'startup'. Cause: " + err);
                 return;
             }
             console.info("Succeeded in putting the value of 'startup'.");
 
-            preferences.flush(function (err) {
+            preferences.flush((err: BusinessError) => {
                 if (err) {
                     console.error("Failed to flush. Cause: " + err);
                     return;
@@ -1890,31 +1964,35 @@ off(type: 'change', callback?: Callback&lt;{ key : string }&gt;): void
 **示例：**
 
 ```js
+interface observer {
+  key: string
+}
 try {
-    data_preferences.getPreferences(this.context, 'mystore', function (err, preferences) {
+    data_preferences.getPreferences(this.context, 'myStore', (err: BusinessError, val: data_preferences.Preferences) => {
         if (err) {
             console.error("Failed to get preferences.");
             return;
         }
-        let observer = function (key) {
+        preferences.on('change', (key: observer) => {
             console.info("The key " + key + " changed.");
-        }
-        preferences.on('change', observer);
-        preferences.put('startup', 'auto', function (err) {
+        });
+        preferences.put('startup', 'auto', (err: BusinessError) => {
             if (err) {
                 console.error("Failed to put the value of 'startup'. Cause: " + err);
                 return;
             }
             console.info("Succeeded in putting the value of 'startup'.");
 
-            preferences.flush(function (err) {
+            preferences.flush((err: BusinessError) =>{
                 if (err) {
                     console.error("Failed to flush. Cause: " + err);
                     return;
                 }
                 console.info("Succeeded in flushing.");
             })
-            preferences.off('change', observer);
+            preferences.off('change', (key: observer) => {
+                console.info("The key " + key + " changed.");
+            });
         })
     })
 } catch (err) {
@@ -1940,31 +2018,36 @@ off(type: 'multiProcessChange', callback?: Callback&lt;{ key : string }&gt;): vo
 **示例：**
 
 ```js
+interface observer {
+  key: string
+}
 try {
-    data_preferences.getPreferences(this.context, { name: 'mystore', dataGroupId:'myId' }, function (err, preferences) {
+    let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
+    data_preferences.getPreferences(this.context, options, (err: BusinessError, preferences: data_preferences.Preferences) => {
         if (err) {
             console.error("Failed to get preferences.");
             return;
         }
-        let observer = function (key) {
+        preferences.on('multiProcessChange', (key: observer) => {
             console.info("The key " + key + " changed.");
-        }
-        preferences.on('multiProcessChange', observer);
-        preferences.put('startup', 'auto', function (err) {
+        });
+        preferences.put('startup', 'auto', (err: BusinessError) => {
             if (err) {
                 console.error("Failed to put the value of 'startup'. Cause: " + err);
                 return;
             }
             console.info("Succeeded in putting the value of 'startup'.");
 
-            preferences.flush(function (err) {
+            preferences.flush((err: BusinessError) => {
                 if (err) {
                     console.error("Failed to flush. Cause: " + err);
                     return;
                 }
                 console.info("Succeeded in flushing.");
             })
-            preferences.off('multiProcessChange', observer);
+            preferences.off('multiProcessChange', (key: observer) => {
+                console.info("The key " + key + " changed.");
+            });
         })
     })
 } catch (err) {