diff --git a/api/@ohos.distributedDeviceManager.d.ts b/api/@ohos.distributedDeviceManager.d.ts
index 54dc1a290a2019e245ac442eba5154ada8260741..31b00be0fe54b33c08a5ee95e02f51ec23c764c2 100644
--- a/api/@ohos.distributedDeviceManager.d.ts
+++ b/api/@ohos.distributedDeviceManager.d.ts
@@ -111,6 +111,106 @@ declare namespace distributedDeviceManager {
     UNAVAILABLE = 2,
   }
 
+  /**
+   * Device status change result.
+   * @interface DeviceStateChangeResult
+   * @syscap SystemCapability.DistributedHardware.DeviceManager
+   * @since 20
+   * @arkts 1.2
+   */
+  interface DeviceStateChangeResult {
+    /**
+     * The state of the nearby devices.
+     * @type { DeviceStateChange }
+     * @syscap SystemCapability.DistributedHardware.DeviceManager
+     * @since 20
+     * @arkts 1.2
+     */
+    action: DeviceStateChange;
+    /**
+     * Basic description information of a distributed device.
+     * @type { DeviceBasicInfo }
+     * @syscap SystemCapability.DistributedHardware.DeviceManager
+     * @since 20
+     * @arkts 1.2
+     */
+    device: DeviceBasicInfo;
+  }
+
+  /**
+   * Device name change result.
+   * @interface DeviceNameChangeResult
+   * @syscap SystemCapability.DistributedHardware.DeviceManager
+   * @since 20
+   * @arkts 1.2
+   */
+  interface DeviceNameChangeResult {
+    /**
+     * Device name.
+     * @type { string }
+     * @syscap SystemCapability.DistributedHardware.DeviceManager
+     * @since 20
+     * @arkts 1.2
+     */
+    deviceName: string;
+  }
+
+  /**
+   * Discovery failure result.
+   * @interface DiscoveryFailureResult
+   * @syscap SystemCapability.DistributedHardware.DeviceManager
+   * @since 20
+   * @arkts 1.2
+   */
+  interface DiscoveryFailureResult {
+    /**
+     * Discovery failure cause code.
+     * @type { number }
+     * @syscap SystemCapability.DistributedHardware.DeviceManager
+     * @since 20
+     * @arkts 1.2
+     */
+    reason: number;
+  }
+
+  /**
+   * Discovery successful result.
+   * @interface DiscoverySuccessResult
+   * @syscap SystemCapability.DistributedHardware.DeviceManager
+   * @since 20
+   * @arkts 1.2
+   */
+  interface DiscoverySuccessResult {
+    /**
+     * Basic description information of a distributed device.
+     * @type { DeviceBasicInfo }
+     * @syscap SystemCapability.DistributedHardware.DeviceManager
+     * @since 20
+     * @arkts 1.2
+     */
+    device: DeviceBasicInfo;
+  }
+
+  /**
+   * Reply result.
+   * @interface ReplyResult
+   * @syscap SystemCapability.DistributedHardware.DeviceManager
+   * @systemapi
+   * @since 20
+   * @arkts 1.2
+   */
+  interface ReplyResult {
+    /**
+     * Param of ui state changes.
+     * @type { string }
+     * @syscap SystemCapability.DistributedHardware.DeviceManager
+     * @systemapi
+     * @since 20
+     * @arkts 1.2
+     */
+    param: string;
+  }
+
   /**
    * Device profile information filter options.
    * @interface DeviceProfileInfoFilterOptions
@@ -897,7 +997,7 @@ declare namespace distributedDeviceManager {
      * @syscap SystemCapability.DistributedHardware.DeviceManager
      * @since 10
      */
-    on(type: 'deviceStateChange', callback: Callback<{ action: DeviceStateChange; device: DeviceBasicInfo; }>): void;
+    on(type: 'deviceStateChange', callback: Callback<DeviceStateChangeResult>): void;
 
     /**
      * UnRegister device state callback based on the application bundle name.
@@ -915,7 +1015,7 @@ declare namespace distributedDeviceManager {
      * @syscap SystemCapability.DistributedHardware.DeviceManager
      * @since 10
      */
-    off(type: 'deviceStateChange', callback?: Callback<{ action: DeviceStateChange; device: DeviceBasicInfo; }>): void;
+    off(type: 'deviceStateChange', callback?: Callback<DeviceStateChangeResult>): void;
 
     /**
      * Register a device discovery result callback so that the application can be notified when discovery success.
@@ -949,7 +1049,7 @@ declare namespace distributedDeviceManager {
      * @syscap SystemCapability.DistributedHardware.DeviceManager
      * @since 10
      */
-    off(type: 'discoverSuccess', callback?: Callback<{ device: DeviceBasicInfo; }>): void;
+    off(type: 'discoverSuccess', callback?: Callback<DiscoverySuccessResult>): void;
 
     /**
      * Register a device name change callback so that the application can be notified when discovery success.
@@ -966,7 +1066,7 @@ declare namespace distributedDeviceManager {
      * @syscap SystemCapability.DistributedHardware.DeviceManager
      * @since 10
      */
-    on(type: 'deviceNameChange', callback: Callback<{ deviceName: string; }>): void;
+    on(type: 'deviceNameChange', callback: Callback<DeviceNameChangeResult>): void;
 
     /**
      * UnRegister the device name change result callback.
@@ -983,7 +1083,7 @@ declare namespace distributedDeviceManager {
      * @syscap SystemCapability.DistributedHardware.DeviceManager
      * @since 10
      */
-    off(type: 'deviceNameChange', callback?: Callback<{ deviceName: string; }>): void;
+    off(type: 'deviceNameChange', callback?: Callback<DeviceNameChangeResult>): void;
 
     /**
      * Register a device discovery result callback so that the application can be notified when discover failed.
@@ -1001,7 +1101,7 @@ declare namespace distributedDeviceManager {
      * @syscap SystemCapability.DistributedHardware.DeviceManager
      * @since 10
      */
-    on(type: 'discoverFailure', callback: Callback<{ reason: number; }>): void;
+    on(type: 'discoverFailure', callback: Callback<DiscoveryFailureResult>): void;
 
     /**
      * UnRegister the device discovery result callback.
@@ -1019,7 +1119,7 @@ declare namespace distributedDeviceManager {
      * @syscap SystemCapability.DistributedHardware.DeviceManager
      * @since 10
      */
-    off(type: 'discoverFailure', callback?: Callback<{ reason: number; }>): void;
+    off(type: 'discoverFailure', callback?: Callback<DiscoveryFailureResult>): void;
 
     /**
      * Register a serviceError callback so that the application can be notified when devicemanager service died
@@ -1071,7 +1171,7 @@ declare namespace distributedDeviceManager {
      * @systemapi this method can be used only by system applications.
      * @since 10
      */
-    on(type: 'replyResult', callback: Callback<{ param: string; }>): void;
+    on(type: 'replyResult', callback: Callback<ReplyResult>): void;
 
     /**
       * Unregister uiStateChange, this interface can only be used by devicemanager ui.
@@ -1089,7 +1189,7 @@ declare namespace distributedDeviceManager {
       * @systemapi this method can be used only by system applications.
       * @since 10
       */
-    off(type: 'replyResult', callback?: Callback<{ param: string; }>): void;
+    off(type: 'replyResult', callback?: Callback<ReplyResult>): void;
 
     /**
      * Get the device list under the same account.