diff --git a/api/@ohos.application.Ability.d.ts b/api/@ohos.application.Ability.d.ts
index 130fd64dcdec5f4d48567799f396116ca74ea400..3779d699fe45f94130ee0c535cb89f58e1d91446 100644
--- a/api/@ohos.application.Ability.d.ts
+++ b/api/@ohos.application.Ability.d.ts
@@ -17,6 +17,87 @@ import AbilityConstant from "./@ohos.application.AbilityConstant";
 import AbilityContext from "./application/AbilityContext";
 import Want from './@ohos.application.Want';
 import window from './@ohos.window';
+import rpc from '/@ohos.rpc";
+
+/**
+ * The interface of an Caller.
+ *
+ * @since 9
+ * @sysCap AAFwk
+ * @devices phone, tablet, tv, wearable, car
+ * @permission N/A
+ * @StageModelOnly
+ */
+ interface Caller {
+     /**
+     * Notify the server of Sequenceable type data.
+     *
+     * @since 9
+     * @sysCap AAFwk
+     * @StageModelOnly
+     */
+     call(method, data: rpc.Sequenceable): Promise<void>;
+
+    /**
+     * Notify the server of Sequenceable type data and return the notification result.
+     *
+     * @since 9
+     * @sysCap AAFwk
+     * return Sequenceable data
+     * @StageModelOnly
+     */
+     callWithResult(method: string, data: rpc.Sequenceable): Promise<rpc.MessageParcel>;
+
+    /**
+     * Clear service records.
+     *
+     * @since 9
+     * @sysCap AAFwk
+     * return Sequenceable data
+     * @StageModelOnly
+     */
+     release(): void;
+
+    /**
+     * Register death listener notification callback.
+     *
+     * @since 9
+     * @sysCap AAFwk
+     * return Sequenceable data
+     * @StageModelOnly
+     */
+     onRelease(callback: function): void;
+ }
+ 
+ /**
+ * The interface of an Callee.
+ *
+ * @since 9
+ * @sysCap AAFwk
+ * @devices phone, tablet, tv, wearable, car
+ * @permission N/A
+ * @StageModelOnly
+ */
+ interface Callee {
+
+     /**
+     * Register data listener callback.
+     *
+     * @since 9
+     * @sysCap AAFwk
+     * @StageModelOnly
+     */
+     on(method: string, callback: function): void;
+
+     /**
+     * Unregister data listener callback.
+     *
+     * @since 9
+     * @sysCap AAFwk
+     * @StageModelOnly
+     */
+     off(method: string): void;
+ }
 
 /**
  * The class of an ability.
@@ -55,6 +136,15 @@ export default class Ability {
      */
     lastRequestWant: Want;
 
+    /**
+     * Call Service Sutb Object
+     *
+     * @since 9
+     * @sysCap AAFwk
+     * @StageModelOnly
+     */
+    callee: Callee;
+
     /**
      * Called back when an ability is started for initialization.
      *
diff --git a/api/application/AbilityContext.d.ts b/api/application/AbilityContext.d.ts
index 1757c2c771ab3cee867ccc44b8aadeff99afc0a2..78fbb91b33931f95d621c920969c31f6000e1b43 100644
--- a/api/application/AbilityContext.d.ts
+++ b/api/application/AbilityContext.d.ts
@@ -22,6 +22,7 @@ import Context from "./Context";
 import Want from "../@ohos.application.Want";
 import StartOptions from "../@ohos.application.StartOptions";
 import PermissionRequestResult from "./PermissionRequestResult";
+import Caller from "../@ohos.application.Ability";
 
 /**
  * The context of an ability. It allows access to ability-specific resources.
@@ -64,6 +65,18 @@ export default class AbilityContext extends Context {
     startAbility(want: Want, callback: AsyncCallback<void>): void;
     startAbility(want: Want, options: StartOptions, callback: AsyncCallback<void>): void;
     startAbility(want: Want, options?: StartOptions): Promise<void>;
+    
+    /**
+     * Get the caller object of the startup capability 
+     *
+     * @devices phone, tablet, tv, wearable, car
+     * @since 9
+     * @sysCap AAFwk
+     * @param parameter Indicates the ability to start.
+     * @return Caller
+     * @StageModelOnly
+     */
+    startAbilityByCall(want: Want): Promise<Caller>;
 
     /**
      * Starts a new ability with account.