diff --git a/en/application-dev/reference/apis/Readme-EN.md b/en/application-dev/reference/apis/Readme-EN.md
index edee55c375b0cc31b8f6305ed7fb24397bad12b0..1d49a12635843ec56efa8466f361bca9be5ac969 100644
--- a/en/application-dev/reference/apis/Readme-EN.md
+++ b/en/application-dev/reference/apis/Readme-EN.md
@@ -34,6 +34,8 @@
     - [@ohos.ability.wantConstant](js-apis-ability-wantConstant.md)
     - [@ohos.application.abilityDelegatorRegistry](js-apis-abilityDelegatorRegistry.md)
     - [@ohos.application.abilityManager](js-apis-application-abilityManager.md)
+    - [@ohos.application.AccessibilityExtensionAbility](js-apis-accessibility-extension-context.md)
+    - [@ohos.application.AccessibilityExtensionAbility](js-apis-application-AccessibilityExtensionAbility.md)
     - [@ohos.application.appManager](js-apis-appmanager.md)
     - [@ohos.application.Configuration](js-apis-configuration.md)
     - [@ohos.application.ConfigurationConstant](js-apis-configurationconstant.md)
diff --git a/en/application-dev/reference/apis/js-apis-accessibility-extension-context.md b/en/application-dev/reference/apis/js-apis-accessibility-extension-context.md
new file mode 100644
index 0000000000000000000000000000000000000000..f8323a391ace1995486ff721666805a7bbb9b658
--- /dev/null
+++ b/en/application-dev/reference/apis/js-apis-accessibility-extension-context.md
@@ -0,0 +1,238 @@
+# AccessibilityExtensionContext
+
+The **AccessibilityExtensionContext** module, inherited from **ExtensionContext**, provides context for **Accessibility Extension** abilities.
+
+You can use the APIs of this module to configure the concerned information, obtain root information, and inject gestures.
+
+> **NOTE**
+>
+> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+> The APIs of this module can be used only in the stage model.
+
+## Modules to Import
+
+```js
+import AccessibilityExtensionAbility from '@ohos.application.AccessibilityExtensionAbility'
+```
+
+## FocusDirection
+
+Enumerates the focus directions.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name      | Description     |
+| -------- | ------- |
+| up       | Search for the next focusable item above the current item in focus.|
+| down     | Search for the next focusable item below the current item in focus.|
+| left     | Search for the next focusable item on the left of the current item in focus.|
+| right    | Search for the next focusable item on the right the current item in focus.|
+| forward  | Search for the next focusable item before the current item in focus.|
+| backward | Search for the next focusable item after the current item in focus.|
+
+## FocusType
+
+Enumerates of the focus types.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name           | Description         |
+| ------------- | ----------- |
+| accessibility | Accessibility focus.|
+| normal        | Normal focus. |
+
+## Rect
+
+Defines a rectangle.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name    | Type  | Readable  | Writable  | Description       |
+| ------ | ------ | ---- | ---- | --------- |
+| left   | number | Yes   | No   | Left boundary of the rectangle.|
+| top    | number | Yes   | No   | Top boundary of the rectangle.|
+| width  | number | Yes   | No   | Width of the rectangle. |
+| height | number | Yes   | No   | Height of the rectangle. |
+
+## WindowType
+
+Enumerates the window types.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name         | Description       |
+| ----------- | --------- |
+| application | Application window.|
+| system      | System window.|
+
+## AccessibilityExtensionContext.setEventTypeFilter
+
+setEventTypeFilter(type: Array<accessibility.EventType>): Promise\<boolean>;
+
+Sets the concerned event type.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name | Type                                    | Mandatory  | Description      |
+| ---- | ---------------------------------------- | ---- | -------- |
+| type | Array&lt;[EventType](js-apis-accessibility.md#EventType)&gt; | Yes   | Event type.|
+
+**Return value**
+
+| Type                    | Description                   |
+| ---------------------- | --------------------- |
+| Promise&lt;boolean&gt; | Promise used to return the result.|
+
+**Example**
+
+```ts
+this.context.setEventTypeFilter(['click', 'longClick']);
+```
+
+## AccessibilityExtensionContext.setTargetBundleName
+
+setTargetBundleName(targetNames: Array\<string>): Promise\<boolean>;
+
+Sets the concerned target bundle.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type               | Mandatory  | Description      |
+| ----------- | ------------------- | ---- | -------- |
+| targetNames | Array&lt;string&gt; | Yes   | Name of the target bundle.|
+
+**Return value**
+
+| Type                    | Description                   |
+| ---------------------- | --------------------- |
+| Promise&lt;boolean&gt; | Promise used to return the result.|
+
+**Example**
+
+```ts
+this.context.setTargetBundleName(['com.ohos.mms']);
+```
+
+## AccessibilityExtensionContext.getFocusElement
+
+getFocusElement(isAccessibilityFocus?: boolean): Promise\<AccessibilityElement>;
+
+Obtains the focus element.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name                 | Type   | Mandatory  | Description                 |
+| -------------------- | ------- | ---- | ------------------- |
+| isAccessibilityFocus | boolean | No   | Whether the obtained focus element is an accessibility focus. The default value is false.|
+
+**Return value**
+
+| Type                                 | Description                    |
+| ----------------------------------- | ---------------------- |
+| Promise&lt;AccessibilityElement&gt; | Promise used to return the current focus element.|
+
+**Example**
+
+```ts
+this.context.getFocusElement().then(focusElement => {
+    console.log("AxExtensionAbility getFocusElement success");
+})
+```
+
+## AccessibilityExtensionContext.getWindowRootElement
+
+getWindowRootElement(windowId?: number): Promise\<AccessibilityElement>;
+
+Obtains the root element of a window.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name     | Type  | Mandatory  | Description                         |
+| -------- | ------ | ---- | --------------------------- |
+| windowId | number | No   | Window for which you want to obtain the root element. If this parameter is not specified, it indicates the current active window.|
+
+**Return value**
+
+| Type                                 | Description                     |
+| ----------------------------------- | ----------------------- |
+| Promise&lt;AccessibilityElement&gt; | Promise used to return the root element.|
+
+**Example**
+
+```ts
+this.context.getWindowRootElement().then(rootElement => {
+    console.log("AxExtensionAbility getWindowRootElement success");
+})
+```
+
+## AccessibilityExtensionContext.getWindows
+
+getWindows(displayId?: number): Promise<Array\<AccessibilityElement>>;
+
+Obtains the list of windows visible to users.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name      | Type  | Mandatory  | Description                       |
+| --------- | ------ | ---- | ------------------------- |
+| displayId | number | No   | Screen from which the window information is obtained. If this parameter is not specified, it indicates the default home screen.|
+
+**Return value**
+
+| Type                                      | Description                      |
+| ---------------------------------------- | ------------------------ |
+| Promise&lt;Array&lt;AccessibilityElement&gt;&gt; | Promise used to return the window list. |
+
+**Example**
+
+```ts
+this.context.getWindows().then(windows => {
+    console.log("AxExtensionAbility getWindows success");
+})
+```
+
+## AccessibilityExtensionContext.gestureInject
+
+gestureInject(gesturePath: GesturePath, listener: Callback\<boolean>): Promise\<boolean
+
+Injects a gesture.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| gesturePath | [GesturePath](js-apis-application-AccessibilityExtensionAbility.md#GesturePath) | Yes   | Path of the gesture to inject.    |
+| listener    | Callback&lt;boolean&gt;                  | Yes   | Callback used to return the result.|
+
+**Return value**
+
+| Type                    | Description                    |
+| ---------------------- | ---------------------- |
+| Promise&lt;boolean&gt; | Promise used to return the result.|
+
+**Example**
+
+```ts
+let gesturePath = new GesturePath(100);
+for (let i = 0; i < 10; i++) {
+    let gesturePoint = new GesturePosition(100, i * 200);
+    gesturePath.positions.push(gesturePoint);
+}
+this.context.gestureInject(gesturePath, (result) => {
+    console.info('gestureInject result: ' + result);
+})
+```
diff --git a/en/application-dev/reference/apis/js-apis-application-AccessibilityExtensionAbility.md b/en/application-dev/reference/apis/js-apis-application-AccessibilityExtensionAbility.md
new file mode 100644
index 0000000000000000000000000000000000000000..2b4b2d249af1a50e2427773f36e8c1270481ca55
--- /dev/null
+++ b/en/application-dev/reference/apis/js-apis-application-AccessibilityExtensionAbility.md
@@ -0,0 +1,231 @@
+# Accessibility Extension Ability
+
+The **AccessibilityExtensionAbility** module is based on the ExtensionAbility framework and provides the **AccessibilityExtensionAbility**.
+
+>**NOTE**
+>
+>The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+>
+>The APIs of this module can be used only in the stage model.
+
+## Modules to Import
+
+```ts
+import AccessibilityExtensionAbility from '@ohos.application.AccessibilityExtensionAbility'
+```
+
+## AccessibilityEvent
+
+Defines an accessibility event.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+### Attributes
+
+| Name       | Type                                    | Readable  | Writable  | Description        |
+| --------- | ---------------------------------------- | ---- | ---- | ---------- |
+| eventType | [EventType](js-apis-accessibility.md#EventType) \| [WindowUpdateType](js-apis-accessibility.md#WindowUpdateType) \| [TouchGuideType](touchguidetype) \| [GestureType](gesturetype) \| [PageUpdateType](pageupdatetype) | Yes   | No   | Event type.   |
+| target    | AccessibilityElement                     | Yes   | No   | Target component where the event occurs.|
+| timeStamp | number                                   | Yes   | No   | Timestamp of the event.    |
+
+## GesturePath
+
+Defines a gesture path.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+### Attributes
+
+| Name          | Type                                    | Readable  | Writable  | Description    |
+| ------------ | ---------------------------------------- | ---- | ---- | ------ |
+| points       | Array&lt;[GesturePoint](gesturepoint)&gt; | Yes   | Yes   | An array of gesture touch points. |
+| durationTime | number                                   | Yes   | Yes   | Total time consumed by the gesture.|
+
+### constructor
+
+constructor(durationTime: number)
+
+A constructor used to create a **GesturePath** object.
+
+**Parameters**
+
+| Name         | Type  | Mandatory  | Description    |
+| ------------ | ------ | ---- | ------ |
+| durationTime | number | Yes   | Total time consumed by the gesture.|
+
+**Example**
+
+```typescript
+let gesturePath = new GesturePath(100);
+```
+
+## GesturePoint
+
+Defines a gesture touch point.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+### Attributes
+
+| Name       | Type  | Readable  | Writable  | Description     |
+| --------- | ------ | ---- | ---- | ------- |
+| positionX | number | Yes   | Yes   | X-coordinate of the touch point.|
+| positionY | number | Yes   | Yes   | Y-coordinate of the touch point.|
+
+### constructor
+
+constructor(positionX: number, positionY: number)
+
+A constructor used to create a **GesturePoint** object.
+
+**Parameters**
+
+| Name      | Type  | Mandatory  | Description     |
+| --------- | ------ | ---- | ------- |
+| positionX | number | Yes   | X-coordinate of the touch point.|
+| positionY | number | Yes   | Y-coordinate of the touch point.|
+
+**Example**
+
+```typescript
+let gesturePoint = new GesturePoint(100, 200);
+```
+
+## GestureType
+
+Enumerates gesture types.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name           | Description          |
+| ------------- | ------------ |
+| left          | Left gesture.    |
+| leftThenRight | Left-then-right gesture.|
+| leftThenUp    | Left-then-up gesture.|
+| leftThenDown  | Left-then-down gesture.|
+| right         | Right gesture.    |
+| rightThenLeft | Right-then-left gesture.|
+| rightThenUp   | Right-then-up gesture.|
+| rightThenDown | Right-then-down gesture.|
+| up            | Up gesture.    |
+| upThenLeft    | Up-then-left gesture.|
+| upThenRight   | Up-then-right gesture.|
+| upThenDown    | Up-then-down gesture.|
+| down          | Down gesture.    |
+| downThenLeft  | Down-then-left gesture.|
+| downThenRight | Down-then-right gesture.|
+| downThenUp    | Down-then-up gesture.|
+
+## PageUpdateType
+
+Enumerates the page refresh types.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name               | Description       |
+| ----------------- | --------- |
+| pageContentUpdate | Update of the page content.|
+| pageStateUpdate   | Update of the page status.|
+
+## TouchGuideType
+
+Enumerates the touch guide event types.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name        | Description          |
+| ---------- | ------------ |
+| touchBegin | A touch starts in touch guide mode.|
+| touchEnd   | A touch ends in touch guide mode.|
+
+## AccessibilityExtensionAbility.onConnect
+
+onConnect(): void;
+
+Called when the **AccessibilityExtensionAbility** is enabled and connected to the system service. In this API, you can initialize service logic. This API can be overridden as required.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+None
+
+**Example**
+
+```ts
+onConnect(): void {
+    console.log("AxExtensionAbility onConnect");
+}
+```
+
+## AccessibilityExtensionAbility.onDisconnect
+
+onDisconnect(): void;
+
+Called when the **AccessibilityExtensionAbility** is disabled and disconnected from the system service. In this API, you can implement the service logic of resource release and exit. This API can be overridden as required.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+None
+
+**Example**
+
+```ts
+onDisconnect(): void {
+    console.log("AxExtensionAbility onDisconnect");
+}
+```
+
+## AccessibilityExtensionAbility.onAccessibilityEvent
+
+onAccessibilityEvent(event: AccessibilityEvent): void;
+
+Called when an event that matches the specified bundle and event type occurs. In this API, you can implement event-specific service logic. Generally, this API needs to be overridden.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name  | Type                                    | Mandatory  | Description             |
+| ----- | ---------------------------------------- | ---- | --------------- |
+| event | [AccessibilityEvent](accessibilityevent) | Yes   | Accessibility event. No value is returned.|
+
+**Example**
+
+```ts
+onAccessibilityEvent(event: AccessibilityEvent): void {
+    console.log("AxExtensionAbility onAccessibilityEvent");
+    if (event.eventType == 'click') {
+        console.log("AxExtensionAbility onAccessibilityEvent: click");
+    }
+}
+```
+
+## AccessibilityExtensionAbility.onKeyEvent
+
+onKeyEvent(keyEvent: inputEventClient.KeyEvent): boolean;
+
+Called when a physical key is pressed. In this API, you can determine whether to intercept the key event based on the service.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name     | Type                                    | Mandatory  | Description                     |
+| -------- | ---------------------------------------- | ---- | ----------------------- |
+| keyEvent | [KeyEvent](js-apis-inputeventclient.md#KeyEvent) | Yes   | Key event. If **true** is returned, the key is intercepted.|
+
+**Example**
+
+```ts
+onKeyEvent(keyEvent: inputEventClient.KeyEvent): boolean {
+    console.log("AxExtensionAbility onKeyEvent");
+    if (keyEvent.keyCode == 22) {
+        console.log("AxExtensionAbility onKeyEvent: intercept 22");
+        return true;
+    }
+    return false;
+}
+```
diff --git a/en/application-dev/reference/apis/js-apis-system-parameter.md b/en/application-dev/reference/apis/js-apis-system-parameter.md
index 999c894303b070539e3fdc5c4010aaa0a5f19803..cf95a9625934bc0952211b8cc36f26a94f8a63d8 100644
--- a/en/application-dev/reference/apis/js-apis-system-parameter.md
+++ b/en/application-dev/reference/apis/js-apis-system-parameter.md
@@ -7,7 +7,7 @@
 ## Modules to Import
 
 ```ts
-import parameter from '@ohos.systemParameter'
+import parameter from '@ohos.systemparameter'
 ```
 
 
@@ -216,7 +216,7 @@ Sets a value for the attribute with the specified key. This API uses a promise t
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
 | key | string | Yes| Key of the system attribute.|
-| value| string | Yes | System attribute value to set.|
+| value| string | Yes| System attribute value to set.|
 
 **Return value**