diff --git a/api/@ohos.accessibility.config.d.ts b/api/@ohos.accessibility.config.d.ts
index 2dfac6d56a12e8b0f7d6f5389a8e05bf6d719822..cbb2721498f794bda3d97171ea19f8e9e3989368 100644
--- a/api/@ohos.accessibility.config.d.ts
+++ b/api/@ohos.accessibility.config.d.ts
@@ -77,13 +77,20 @@ declare namespace config {
    * Enable the accessibility extension ability.
    * @param name Indicates the accessibility extension name, in "bundleName/abilityName" format.
    * @param capability Indicates the ability.
+   * @throws {BusinessError} 如果没有设置属性的权限.
+   * @throws {BusinessError} 如果包名不正确或者不存在.
+   * @throws {BusinessError} 如果该扩展已经使能.
+   * @throws {BusinessError} 如果callback参数类型错误。
    */
   function enableAbility(name: string, capability: Array<accessibility.Capability>): Promise<void>;
   function enableAbility(name: string, capability: Array<accessibility.Capability>, callback: AsyncCallback<void>): void;
 
   /**
-   * Disable the accessibility extension ability.
+   * Disable the accessibility exte+nsion ability.
    * @param name Indicates the accessibility extension name, in "bundleName/abilityName" format.
+   * @throws {BusinessError} 如果没有设置属性的权限.
+   * @throws {BusinessError} 如果包名不正确或者不存在.
+   * @throws {BusinessError} 如果callback参数类型错误.
    */
   function disableAbility(name: string): Promise<void>;
   function disableAbility(name: string, callback: AsyncCallback<void>): void;
@@ -92,15 +99,18 @@ declare namespace config {
    * Register the listener that watches for changes in the enabled status of accessibility extensions.
    * @param type Indicates the enableAbilityListsStateChanged type.
    * @param callback Indicates the listener.
+   * @throws {BusinessError} 如果callback参数类型错误。
    */
-  function on(type: 'enableAbilityListsStateChanged', callback: Callback<void>): void;
+  function on(type: 'enabledAccessibilityExtensionListChange', callback: Callback<void>): void;
+  // 变更理由：原方法名有问题，不合适。
 
   /**
    * Deregister listener that watches for changes in the enabled status of accessibility extensions.
    * @param type Indicates the enableAbilityListsStateChanged type.
    * @param callback Indicates the listener.
+   * @throws {BusinessError} 如果callback参数类型错误。
    */
-  function off(type: 'enableAbilityListsStateChanged', callback?: Callback<void>): void;
+  function off(type: 'enabledAccessibilityExtensionListChange', callback?: Callback<void>): void;
 
   /**
    * Indicates setting, getting, and listening to changes in configuration.
@@ -109,12 +119,16 @@ declare namespace config {
     /**
      * Setting configuration value.
      * @param value Indicates the value.
+     * @throws {BusinessError} 如果没有设置属性的权限.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     set(value: T): Promise<void>;
     set(value: T, callback: AsyncCallback<void>): void;
 
     /**
      * Getting configuration value.
+     * @throws {BusinessError} 如果没有获取属性的权限.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     get(): Promise<T>;
     get(callback: AsyncCallback<T>): void;
@@ -122,12 +136,15 @@ declare namespace config {
     /**
      * Register the listener to listen for configuration changes.
      * @param callback Indicates the listener.
+     * @throws {BusinessError} 如果没有获取属性的权限.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     on(callback: Callback<T>): void;
 
     /**
      * Deregister the listener to listen for configuration changes.
      * @param callback Indicates the listener.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     off(callback?: Callback<T>): void;
   }
diff --git a/api/@ohos.accessibility.d.ts b/api/@ohos.accessibility.d.ts
index 50f45c02511d3221390c5f66ef819796005be0cf..9a86be03a1bbf58cf58102100b54975314f18786 100644
--- a/api/@ohos.accessibility.d.ts
+++ b/api/@ohos.accessibility.d.ts
@@ -95,52 +95,78 @@ declare namespace accessibility {
   /**
    * Checks whether accessibility ability is enabled.
    * @since 7
+   * @deprecated since 9
    * @param callback Asynchronous callback interface.
    * @syscap SystemCapability.BarrierFree.Accessibility.Core
    * @return Returns {@code true} if the accessibility is enabled; returns {@code false} otherwise.
-  */
+   */
   function isOpenAccessibility(callback: AsyncCallback<boolean>): void;
   function isOpenAccessibility(): Promise<boolean>;
 
+  /**
+   * Checks whether accessibility ability is enabled.
+   * @since 9
+   * @param callback Asynchronous callback interface.
+   * @syscap SystemCapability.BarrierFree.Accessibility.Core
+   * @return Returns {@code true} if the accessibility is enabled; returns {@code false} otherwise.
+   * @throws {BusinessError} 如果callback参数类型错误。
+   */
+  function isAccessibilityExtensionEnabled(callback: AsyncCallback<boolean>): void;
+  function isAccessibilityExtensionEnabled(): Promise<boolean>;
+
   /**
    * Checks touch browser ability (which is used by talkback) is enabled.
    * @since 7
+   * @deprecated since 9
    * @param callback Asynchronous callback interface.
    * @syscap SystemCapability.BarrierFree.Accessibility.Vision
    * @return Returns {@code true} if the touch browser is enabled; returns {@code false} otherwise.
-  */
+   */
   function isOpenTouchGuide(callback: AsyncCallback<boolean>): void;
   function isOpenTouchGuide(): Promise<boolean>;
 
+  /**
+   * Checks touch browser ability (which is used by talkback) is enabled.
+   * @since 9
+   * @param callback Asynchronous callback interface.
+   * @syscap SystemCapability.BarrierFree.Accessibility.Vision
+   * @return Returns {@code true} if the touch browser is enabled; returns {@code false} otherwise.
+   * @throws {BusinessError} 如果参数类型错误。
+   */
+  function isScreenReaderEnabled(callback: AsyncCallback<boolean>): void;
+  function isScreenReaderEnabled(): Promise<boolean>;
+
   /**
    * Queries the list of accessibility abilities.
    * @since 7
+   * @deprecated since 9
    * @param abilityType The type of the accessibility ability. {@code AbilityType} eg.spoken
    * @param stateType The state of the accessibility ability.  {@code AbilityState} eg.installed
    * @syscap SystemCapability.BarrierFree.Accessibility.Core
    * @return Returns the list of abilityInfos.
-  */
+   */
   function getAbilityLists(abilityType: AbilityType, stateType: AbilityState,
     callback: AsyncCallback<Array<AccessibilityAbilityInfo>>): void;
   function getAbilityLists(abilityType: AbilityType,
     stateType: AbilityState): Promise<Array<AccessibilityAbilityInfo>>;
 
+
   /**
    * Queries the list of accessibility abilities.
    * @since 9
-   * @param abilityType The all type of the accessibility ability.
+   * @param abilityType The type of the accessibility ability. {@code AbilityType} eg.spoken
    * @param stateType The state of the accessibility ability.  {@code AbilityState} eg.installed
    * @syscap SystemCapability.BarrierFree.Accessibility.Core
    * @return Returns the list of abilityInfos.
-  */
-  function getAbilityLists(abilityType: 'all', stateType: AbilityState,
-    callback: AsyncCallback<Array<AccessibilityAbilityInfo>>): void;
-  function getAbilityLists(abilityType: 'all',
-    stateType: AbilityState): Promise<Array<AccessibilityAbilityInfo>>;
+   * @throws {BusinessError} 如果abilityType或者stateType参数类型错误,callback参数类型错误
+   */
+  function getAccessibilityExtensionList(abilityType: AbilityType, stateType: AbilityState): Promise<Array<AccessibilityAbilityInfo>>;
+  function getAccessibilityExtensionList(abilityType: AbilityType, stateType: AbilityState, callback: AsyncCallback<Array<AccessibilityAbilityInfo>>): void;
 
   /**
    * Send accessibility Event.
    * @since 7
+   * @deprecated since 9
    * @param event The object of the accessibility {@code EventInfo} .
    * @param callback Asynchronous callback interface.
    * @syscap SystemCapability.BarrierFree.Accessibility.Core
@@ -149,9 +175,22 @@ declare namespace accessibility {
   function sendEvent(event: EventInfo, callback: AsyncCallback<void>): void;
   function sendEvent(event: EventInfo): Promise<void>;
 
+  /**
+   * Send accessibility Event.
+   * @since 9
+   * @param event The object of the accessibility {@code EventInfo} .
+   * @param callback Asynchronous callback interface.
+   * @syscap SystemCapability.BarrierFree.Accessibility.Core
+   * @return Returns {@code true} if success ; returns {@code false} otherwise.
+   * @throws {BusinessError} 如果event或者callback参数类型错误。
+   */
+  function sendAccessibilityEvent(event: EventInfo, callback: AsyncCallback<void>): void;
+  function sendAccessibilityEvent(event: EventInfo): Promise<void>;
+
   /**
    * Register the observe of the accessibility state changed.
    * @since 7
+   * @deprecated since 9
    * @param type state event type.
    * @param callback Asynchronous callback interface.
    * @syscap SystemCapability.BarrierFree.Accessibility.Core
@@ -159,9 +198,21 @@ declare namespace accessibility {
    */
   function on(type: 'accessibilityStateChange', callback: Callback<boolean>): void;
 
+  /**
+   * Register the observe of the accessibility extension enable state changed.
+   * @since 9
+   * @param type state event type.
+   * @param callback Asynchronous callback interface.
+   * @syscap SystemCapability.BarrierFree.Accessibility.Core
+   * @return Returns {@code true} if the register is success ; returns {@code false} otherwise.
+   * @throws {BusinessError} 如果callback参数类型错误。
+   */
+  function on(type: 'accessibilityExtensionEnableStateChange', callback: Callback<boolean>): void;
+
   /**
    * Register the observe of the touchGuide state changed.
    * @since 7
+   * @deprecated since 9
    * @param type state event type.
    * @param callback Asynchronous callback interface.
    * @syscap SystemCapability.BarrierFree.Accessibility.Vision
@@ -169,9 +220,21 @@ declare namespace accessibility {
    */
   function on(type: 'touchGuideStateChange', callback: Callback<boolean>): void;
 
+  /**
+   * Register the observe of the screen reader enable state changed.
+   * @since 9
+   * @param type state event type.
+   * @param callback Asynchronous callback interface.
+   * @syscap SystemCapability.BarrierFree.Accessibility.Vision
+   * @return Returns {@code true} if the register is success ; returns {@code false} otherwise.
+   * @throws {BusinessError} 如果callback参数类型错误。
+   */
+  function on(type: 'screenReaderEnableStateChange', callback: Callback<boolean>): void;
+
   /**
    * Deregister the observe of the accessibility state changed.
    * @since 7
+   * @deprecated since 9
    * @param type state event type
    * @param callback Asynchronous callback interface.
    * @syscap SystemCapability.BarrierFree.Accessibility.Core
@@ -179,15 +242,38 @@ declare namespace accessibility {
    */
   function off(type: 'accessibilityStateChange', callback?: Callback<boolean>): void;
 
+
+  /**
+   * Deregister the observe of the accessibility extension enable state changed.
+   * @since 9
+   * @param type state event type
+   * @param callback Asynchronous callback interface.
+   * @syscap SystemCapability.BarrierFree.Accessibility.Core
+   * @return Returns {@code true} if the deregister is success ; returns {@code false} otherwise.
+   * @throws {BusinessError} 如果callback参数类型错误。
+   */
+  function off(type: 'accessibilityExtensionEnableStateChange', callback?: Callback<boolean>): void;
+
   /**
    * Deregister the observe of the touchGuide state changed.
    * @since 7
+   * @deprecated since 9
    * @param type state event type
    * @param callback Asynchronous callback interface.
    * @return Returns {@code true} if the deregister is success ; returns {@code false} otherwise.
    */
    function off(type: 'touchGuideStateChange', callback?: Callback<boolean>): void;
 
+  /**
+   * Deregister the observe of the screen reader enable state changed.
+   * @since 9
+   * @param type state event type
+   * @param callback Asynchronous callback interface.
+   * @return Returns {@code true} if the deregister is success ; returns {@code false} otherwise.
+   * @throws {BusinessError} 如果callback参数类型错误。
+   */
+   function off(type: 'screenReaderEnableStateChange', callback?: Callback<boolean>): void;
+
   /**
    * Get the captions manager.
    * @syscap SystemCapability.BarrierFree.Accessibility.Hearing
@@ -213,20 +299,49 @@ declare namespace accessibility {
  
      /**
       * Register the observe of the enable state.
+      * @deprecated since 9
       */
      on(type: 'enableChange', callback: Callback<boolean>): void;
+
+     /**
+      * Register the observe of the enable state.
+      * @since 9
+      * @throws {BusinessError} 如果callback参数类型错误。
+      */
+     on(type: 'enableStateChange', callback: Callback<boolean>): void;
+
      /**
       * Register the observer of the style.
+      * @deprecated since 9
       */
      on(type: 'styleChange', callback: Callback<CaptionsStyle>): void;
+
+     /**
+      * Register the observer of the style.
+      */
+     on(type: 'captionsStyleChange', callback: Callback<CaptionsStyle>): void;
+
      /**
       * Deregister the observe of the enable state.
+      * @deprecated since 9
       */
      off(type: 'enableChange', callback?: Callback<boolean>): void;
+
+     /**
+      * Deregister the observe of the enable state.
+      */
+     off(type: 'enableStateChange', callback?: Callback<boolean>): void;
+
      /**
       * Deregister the observer of the style.
+      * @deprecated since 9
       */
      off(type: 'styleChange', callback?: Callback<CaptionsStyle>): void;
+
+     /**
+      * Deregister the observer of the style.
+      */
+     off(type: 'captionsStyleChange', callback?: Callback<CaptionsStyle>): void;
    }
  
    /**
diff --git a/api/application/AccessibilityExtensionContext.d.ts b/api/application/AccessibilityExtensionContext.d.ts
index 13522488182722a18ee7bef578b2c72ce56bda73..50a0acce9ab2f6591f6b0166846be9ee21c08421 100644
--- a/api/application/AccessibilityExtensionContext.d.ts
+++ b/api/application/AccessibilityExtensionContext.d.ts
@@ -28,6 +28,7 @@ export default class AccessibilityExtensionContext extends ExtensionContext {
     /**
      * Set the name of the bundle name that is interested in sending the event.
      * @param targetNames 
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     setTargetBundleName(targetNames: Array<string>): Promise<void>;
     setTargetBundleName(targetNames: Array<string>, callback: AsyncCallback<void>): void;
@@ -35,6 +36,8 @@ export default class AccessibilityExtensionContext extends ExtensionContext {
     /**
      * Get focus element.
      * @param isAccessibilityFocus Indicates whether the acquired element has an accessibility focus.
+     * @throws {BusinessError} 如果用户没有给予执行该方法的权限。
+     * @throws {BusinessError} 如果参数类型错误。
      */
     getFocusElement(isAccessibilityFocus?: boolean): Promise<AccessibilityElement>;
     getFocusElement(callback: AsyncCallback<AccessibilityElement>): void;
@@ -43,6 +46,8 @@ export default class AccessibilityExtensionContext extends ExtensionContext {
     /**
      * Get window root element.
      * @param windowId Indicates the window ID.
+     * @throws {BusinessError} 如果用户没有给予执行该方法的权限。
+     * @throws {BusinessError} 如果参数类型错误。
      */
     getWindowRootElement(windowId?: number): Promise<AccessibilityElement>;
     getWindowRootElement(callback: AsyncCallback<AccessibilityElement>): void;
@@ -51,6 +56,8 @@ export default class AccessibilityExtensionContext extends ExtensionContext {
     /**
      * Get window list.
      * @param displayId Indicates the display ID.
+     * @throws {BusinessError} 如果用户没有给予执行该方法的权限。
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     getWindows(displayId?: number): Promise<Array<AccessibilityElement>>;
     getWindows(callback: AsyncCallback<Array<AccessibilityElement>>): void;
@@ -59,6 +66,8 @@ export default class AccessibilityExtensionContext extends ExtensionContext {
     /**
      * Inject gesture path events.
      * @param gesturePath Indicates the gesture path.
+     * @throws {BusinessError} 如果用户没有给予执行该方法的权限。
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     injectGesture(gesturePath: GesturePath): Promise<void>;
     injectGesture(gesturePath: GesturePath, callback: AsyncCallback<void>): void;
@@ -74,6 +83,7 @@ export default class AccessibilityExtensionContext extends ExtensionContext {
 declare interface AccessibilityElement {
     /**
      * Get a list of attribute names.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     attributeNames<T extends keyof ElementAttributeValues>(): Promise<Array<T>>;
     attributeNames<T extends keyof ElementAttributeValues>(callback: AsyncCallback<Array<T>>): void;
@@ -81,6 +91,8 @@ declare interface AccessibilityElement {
     /**
      * Get the value of an attribute.
      * @param attributeName Indicates the attribute name.
+     * @throws {BusinessError} 如果属性不存在。
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     attributeValue<T extends keyof ElementAttributeValues>(attributeName: T): Promise<ElementAttributeValues[T]>;
     attributeValue<T extends keyof ElementAttributeValues>(attributeName: T,
@@ -88,6 +100,7 @@ declare interface AccessibilityElement {
 
     /**
      * Get a list of supported actions.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     actionNames(): Promise<Array<string>>;
     actionNames(callback: AsyncCallback<Array<string>>): void;
@@ -96,15 +109,18 @@ declare interface AccessibilityElement {
      * Perform the specified action.
      * @param actionName Indicates the action name.
      * @param parameters Indicates the parameters needed to execute the action.
+     * @throws {BusinessError} 如果不支持该动作。
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
-    performAction(actionName: string, parameters?: object): Promise<boolean>;
-    performAction(actionName: string, callback: AsyncCallback<boolean>): void;
-    performAction(actionName: string, parameters: object, callback: AsyncCallback<boolean>): void;
+    performAction(actionName: string, parameters?: object): Promise<void>;
+    performAction(actionName: string, callback: AsyncCallback<void>): void;
+    performAction(actionName: string, parameters: object, callback: AsyncCallback<void>): void;
     
     /**
      * Find elements that match the condition.
      * @param type The type of query condition is content.
      * @param condition Indicates the specific content to be queried.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     findElement(type: 'content', condition: string): Promise<Array<AccessibilityElement>>;
     findElement(type: 'content', condition: string, callback: AsyncCallback<Array<AccessibilityElement>>): void
@@ -113,6 +129,7 @@ declare interface AccessibilityElement {
      * Find elements that match the condition.
      * @param type The type of query condition is focus type.
      * @param condition Indicates the type of focus to query.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     findElement(type: 'focusType', condition: FocusType): Promise<AccessibilityElement>;
     findElement(type: 'focusType', condition: FocusType, callback: AsyncCallback<AccessibilityElement>): void
@@ -121,6 +138,7 @@ declare interface AccessibilityElement {
      * Find elements that match the condition.
      * @param type The type of query condition is focus direction.
      * @param condition Indicates the direction of search focus to query.
+     * @throws {BusinessError} 如果callback参数类型错误。
      */
     findElement(type: 'focusDirection', condition: FocusDirection): Promise<AccessibilityElement>;
     findElement(type: 'focusDirection', condition: FocusDirection, callback: AsyncCallback<AccessibilityElement>): void