diff --git a/api/@ohos.systemTime.d.ts b/api/@ohos.systemTime.d.ts
index ef8856074dcafb4a0be901e19ee73cccc5492e30..19cc598d7b8aaf5c0501dead57506a9895b84da3 100755
--- a/api/@ohos.systemTime.d.ts
+++ b/api/@ohos.systemTime.d.ts
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-import { AsyncCallback, ErrorCallback } from './basic';
+import {AsyncCallback, ErrorCallback} from './basic';
 
 /**
  * System time and timezone.
@@ -24,67 +24,193 @@ import { AsyncCallback, ErrorCallback } from './basic';
 declare namespace systemTime {
     /**
      * Sets the system time.
+     * 
      * @permission ohos.permission.SET_TIME
-     * @param time Target time stamp (ms)
+     * @param {number} time - Target time stamp (ms)
+     * @param {AsyncCallback<void>} callback - The callback function.
+     * @throws {BusinessError} 201 - if forbidden by permission: ohos.permission.SET_TIME.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
      * @since 7
      */
-    function setTime(time : number, callback : AsyncCallback<void>) : void;
-    function setTime(time : number) : Promise<void>;
+    function setTime(time: number, callback: AsyncCallback<void>): void;
+    
+    /**
+     * Sets the system time.
+     *
+     * @permission ohos.permission.SET_TIME
+     * @param {number} time - Target time stamp (ms)
+     * @returns {Promise<void>} the promise object.
+     * @throws {BusinessError} 201 - if forbidden by permission: ohos.permission.SET_TIME.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 7
+     */
+    function setTime(time: number): Promise<void>;
 
     /**
      * Obtains the number of milliseconds that have elapsed since the Unix epoch.
+     *
+     * @param {boolean} isNano - return in nanoseconds if true, otherwise in milliseconds
+     * @param {AsyncCallback<number>} callback - the number of time.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
      * @since 8
      */
     function getCurrentTime(isNano: boolean, callback: AsyncCallback<number>): void;
+
+    /**
+     * Obtains the number of milliseconds that have elapsed since the Unix epoch.
+     *
+     * @param {AsyncCallback<number>} callback - the number of milliseconds.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 8
+     */
     function getCurrentTime(callback: AsyncCallback<number>): void;
+
+    /**
+     * Obtains the number of milliseconds that have elapsed since the Unix epoch.
+     *
+     * @param {boolean} isNano - return in nanoseconds if true, otherwise in milliseconds
+     * @returns {Promise<number>} the number of time.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 8
+     */
     function getCurrentTime(isNano?: boolean): Promise<number>;
 
     /**
      * Obtains the number of milliseconds elapsed since the system was booted, not including deep sleep time.
+     * 
+     * @param {boolean} isNano - return in nanoseconds if true, otherwise in milliseconds
+     * @param {AsyncCallback<number>} callback - the number of time.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
      * @since 8
      */
     function getRealActiveTime(isNano: boolean, callback: AsyncCallback<number>): void;
+
+    /**
+     * Obtains the number of milliseconds elapsed since the system was booted, not including deep sleep time.
+     *
+     * @param {AsyncCallback<number>} callback - the number of milliseconds.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 8
+     */
     function getRealActiveTime(callback: AsyncCallback<number>): void;
+
+    /**
+     * Obtains the number of milliseconds elapsed since the system was booted, not including deep sleep time.
+     *
+     * @param {boolean} isNano - return in nanoseconds if true, otherwise in milliseconds.
+     * @returns {Promise<number>} the number of time.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 8
+     */
     function getRealActiveTime(isNano?: boolean): Promise<number>;
 
     /**
      * Obtains the number of milliseconds elapsed since the system was booted, including deep sleep time.
+     * 
+     * @param {boolean} isNano - return in nanoseconds if true, otherwise in milliseconds
+     * @param {AsyncCallback<number>} callback - the number of time.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
      * @since 8
      */
     function getRealTime(isNano: boolean, callback: AsyncCallback<number>): void;
+
+    /**
+     * Obtains the number of milliseconds elapsed since the system was booted, including deep sleep time.
+     *
+     * @param {AsyncCallback<number>} callback - the number of milliseconds.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 8
+     */
     function getRealTime(callback: AsyncCallback<number>): void;
+
+    /**
+     * Obtains the number of milliseconds elapsed since the system was booted, including deep sleep time.
+     *
+     * @param {boolean} isNano - return in nanoseconds if true, otherwise in milliseconds
+     * @returns {Promise<number>} the number of time.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 8
+     */
     function getRealTime(isNano?: boolean): Promise<number>;
 
     /**
      * Sets the system time.
+     * 
      * @permission ohos.permission.SET_TIME
-     * @param date The target date
+     * @param {Date} date - The target date.
+     * @param {AsyncCallback<void>} callback - the callback function.
+     * @throws {BusinessError} 201 - if forbidden by permission: ohos.permission.SET_TIME.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
      * @since 7
      */
     function setDate(date: Date, callback: AsyncCallback<void>): void;
+
+    /**
+     * Sets the system time.
+     *
+     * @permission ohos.permission.SET_TIME
+     * @param {Date} date - The target date.
+     * @returns {Promise<void>} the promise object.
+     * @throws {BusinessError} 201 - if forbidden by permission: ohos.permission.SET_TIME.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 7
+     */
     function setDate(date: Date): Promise<void>;
 
     /**
      * Obtains the system date.
+     *
+     * @param {AsyncCallback<Date>} callback - the system date.
      * @since 8
      */
     function getDate(callback: AsyncCallback<Date>): void;
+
+    /**
+     * Obtains the system date.
+     *
+     * @returns {Promise<Date>} the system date.
+     * @since 8
+     */
     function getDate(): Promise<Date>;
 
     /**
      * Sets the system time zone.
+     * 
      * @permission ohos.permission.SET_TIME_ZONE
-     * @param timezone The system time zone
+     * @param {string} timezone - The system time zone.
+     * @param {AsyncCallback<void>} callback - the callback function.
+     * @throws {BusinessError} 201 - if forbidden by permission: ohos.permission.SET_TIME_ZONE.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
      * @since 7
      */
     function setTimezone(timezone: string, callback: AsyncCallback<void>): void;
+
+    /**
+     * Sets the system time zone.
+     *
+     * @permission ohos.permission.SET_TIME_ZONE
+     * @param {string} timezone - The system time zone.
+     * @returns {Promise<void>} the promise object.
+     * @throws {BusinessError} 201 - if forbidden by permission: ohos.permission.SET_TIME_ZONE.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @since 7
+     */
     function setTimezone(timezone: string): Promise<void>;
 
-      /**
+    /**
      * Obtains the system time zone.
+     *
+     * @param {AsyncCallback<string>} callback - the system time zone.
      * @since 8
-     */  
+     */
     function getTimezone(callback: AsyncCallback<string>): void;
+
+    /**
+     * Obtains the system time zone.
+     *
+     * @returns {Promise<string>} the system time zone.
+     * @since 8
+     */
     function getTimezone(): Promise<string>;
 }
 
diff --git a/api/@ohos.systemTimer.d.ts b/api/@ohos.systemTimer.d.ts
index 023a3f26442f2feb2affe150f08cab29fb9b2cde..3a844fb3f054885380ac8f0c36c904788c03ed5f 100644
--- a/api/@ohos.systemTimer.d.ts
+++ b/api/@ohos.systemTimer.d.ts
@@ -13,102 +13,213 @@
  * limitations under the License.
  */
 
-import { AsyncCallback, ErrorCallback } from './basic';
-import { WantAgent } from './@ohos.wantAgent';
+import {AsyncCallback, ErrorCallback} from './basic';
+import {WantAgent} from './@ohos.wantAgent';
 
 /**
  * Provides js api for systemTimer
  *
- * @since 7
  * @syscap SystemCapability.MiscServices.Time
  * @systemapi Hide this for inner system use.
+ * @since 7
  */
 declare namespace systemTimer {
-  /**
-   * Indicates the timing policy the timer use, which can be REALTIME or UTC.
-   */
-  const TIMER_TYPE_REALTIME: number;
-
-  /**
-   * Describes whether a timer will wake the device up.
-   */
-  const TIMER_TYPE_WAKEUP: number;
-
-  /**
-   * Describes whether a timer will be delivered precisely at a scheduled time.
-   */
-  const TIMER_TYPE_EXACT: number;
-
-  /**
-   * Indicates whether the timer waking up the system is supported in low-power mode.
-   */
-  const TIMER_TYPE_IDLE: number;
-
-  /**
-   * Creates a timer.
-   * @Param options Indicates the timer options.
-   * @Return timer ID.
-   */
-  function createTimer(options: TimerOptions, callback: AsyncCallback<number>): void;
-  function createTimer(options: TimerOptions): Promise<number>;
-
-  /**
-   * Starts a timer.
-   *
-   * @Param timer The timer ID.
-   * @Param triggerTime Indicates the time at which the timer is triggered for the first time, in milliseconds.
-   *                    The time will be automatically set to 5000 milliseconds after the current time if the passed
-   *                    value is smaller than the current time plus 5000 milliseconds.
-   */
-  function startTimer(timer: number, triggerTime: number, callback: AsyncCallback<void>): void;
-  function startTimer(timer: number, triggerTime: number): Promise<void>;
-
-  /**
-   * Stops a timer.
-   * @Param timer The timer ID.
-   */
-  function stopTimer(timer: number, callback: AsyncCallback<void>): void;
-  function stopTimer(timer: number): Promise<void>;
-
-  /**
-   * Destroy a timer.
-   * @Param timer The timer ID.
-   */
-  function destroyTimer(timer: number, callback: AsyncCallback<void>): void;
-  function destroyTimer(timer: number): Promise<void>;
+    /**
+     * Indicates the timing policy the timer use, which can be REALTIME or UTC.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @systemapi Hide this for inner system use.
+     * @since 7
+     */
+    const TIMER_TYPE_REALTIME: number;
 
     /**
-     * When the repeat is false,the interval is not needed, choose one of wantAgent and callback.
-     * When the repeat is true,the interval is required, the wantAgent is required, and the callback can be left blank.
+     * Describes whether a timer will wake the device up.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @systemapi Hide this for inner system use.
+     * @since 7
+     */
+    const TIMER_TYPE_WAKEUP: number;
+
+    /**
+     * Describes whether a timer will be delivered precisely at a scheduled time.
      *
+     * @syscap SystemCapability.MiscServices.Time
+     * @systemapi Hide this for inner system use.
+     * @since 7
      */
-  interface TimerOptions {
+    const TIMER_TYPE_EXACT: number;
+
     /**
-     * timer type.
+     * Indicates whether the timer waking up the system is supported in low-power mode.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @systemapi Hide this for inner system use.
+     * @since 7
      */
-    type: number;
+    const TIMER_TYPE_IDLE: number;
 
     /**
-     * Indicates a repeating timer
+     * Creates a timer.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @Param options Indicates the timer options.
+     * @param {TimerOptions} options - The necessary configuration information.
+     * @param {AsyncCallback<number>} callback - {number} is the timer ID.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @systemapi Hide this for inner system use.
+     * @since 7
      */
-    repeat: boolean;
+    function createTimer(options: TimerOptions, callback: AsyncCallback<number>): void;
 
     /**
-     * Indicates the interval between two consecutive triggers, in milliseconds.
-     * The interval will be set to 5000 milliseconds automatically if the passed value is smaller than 5000.
+     * Creates a timer.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @Param options Indicates the timer options.
+     * @Return timer ID.
+     * @param {TimerOptions} options - The necessary configuration information.
+     * @returns {Promise<number>} the timer ID.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @systemapi Hide this for inner system use.
+     * @since 7
      */
-    interval?: number;
+    function createTimer(options: TimerOptions): Promise<number>;
 
     /**
-     * Indicates the intent to send when the timer goes off.
+     * Starts a timer.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @Param {number} timer - The timer ID.
+     * @Param {number} triggerTime - Indicates the time at which the timer is triggered for the first time, in milliseconds.
+     *                 The time will be automatically set to 5000 milliseconds after the current time if the passed
+     *                 value is smaller than the current time plus 5000 milliseconds.
+     * @Param {AsyncCallback<void>} callback - The callback function.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @systemapi Hide this for inner system use.
+     * @since 7
      */
-    wantAgent?: WantAgent;
+    function startTimer(timer: number, triggerTime: number, callback: AsyncCallback<void>): void;
 
     /**
-     * Called back when the timer goes off.
+     * Starts a timer.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @Param {number} timer - The timer ID.
+     * @Param {number} triggerTime - Indicates the time at which the timer is triggered for the first time, in milliseconds.
+     *                 The time will be automatically set to 5000 milliseconds after the current time if the passed
+     *                 value is smaller than the current time plus 5000 milliseconds.
+     * @returns {Promise<void>} return a promise object.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @systemapi Hide this for inner system use.
+     * @since 7
      */
-    callback?: () => void;
-  }
+    function startTimer(timer: number, triggerTime: number): Promise<void>;
+
+    /**
+     * Stops a timer.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @Param {number} timer - The timer ID.
+     * @Param {AsyncCallback<void>} callback - The callback function.
+     * @throws throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @systemapi Hide this for inner system use.
+     * @since 7
+     */
+    function stopTimer(timer: number, callback: AsyncCallback<void>): void;
+
+    /**
+     * Stops a timer.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @Param {number} timer - The timer ID.
+     * @returns {Promise<void>} return a promise object.
+     * @throws throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @systemapi Hide this for inner system use.
+     * @since 7
+     */
+    function stopTimer(timer: number): Promise<void>;
+
+    /**
+     * Destroy a timer.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @Param {number} timer - The timer ID.
+     * @Param {AsyncCallback<void>} callback - The callback function.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @systemapi Hide this for inner system use.
+     * @since 7
+     */
+    function destroyTimer(timer: number, callback: AsyncCallback<void>): void;
+
+    /**
+     * Destroy a timer.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @Param {number} timer - The timer ID.
+     * @returns {Promise<void>} return a promise object.
+     * @throws {BusinessError} 401 - if the parameter type is incorrect.
+     * @systemapi Hide this for inner system use.
+     * @since 7
+     */
+    function destroyTimer(timer: number): Promise<void>;
+
+    /**
+     * When the repeat is false,the interval is not needed, choose one of wantAgent and callback.
+     * When the repeat is true,the interval is required, the wantAgent is required, and the callback can be left blank.
+     *
+     * @syscap SystemCapability.MiscServices.Time
+     * @systemapi Hide this for inner system use.
+     * @since 7
+     */
+    interface TimerOptions {
+        /**
+         * The timer type.
+         *
+         * @syscap SystemCapability.MiscServices.Time
+         * @systemapi Hide this for inner system use.
+         * @since 7
+         */
+        type: number;
+
+        /**
+         * Indicates a repeating timer
+         *
+         * @syscap SystemCapability.MiscServices.Time
+         * @systemapi Hide this for inner system use.
+         * @since 7
+         */
+        repeat: boolean;
+
+        /**
+         * Indicates the interval between two consecutive triggers, in milliseconds.
+         * The interval will be set to 5000 milliseconds automatically if the passed value is smaller than 5000.
+         *
+         * @syscap SystemCapability.MiscServices.Time
+         * @systemapi Hide this for inner system use.
+         * @since 7
+         */
+        interval?: number;
+
+        /**
+         * Indicates the intent to send when the timer goes off.
+         *
+         * @syscap SystemCapability.MiscServices.Time
+         * @systemapi Hide this for inner system use.
+         * @since 7
+         */
+        wantAgent?: WantAgent;
+
+        /**
+         * Called back when the timer goes off.
+         *
+         * @syscap SystemCapability.MiscServices.Time
+         * @systemapi Hide this for inner system use.
+         * @since 7
+         */
+        callback?: () => void;
+    }
 }
 
 export default systemTimer;
\ No newline at end of file