diff --git a/api/@ohos.systemTime.d.ts b/api/@ohos.systemTime.d.ts
index d69ec642af8bb6435ef764cdb3efa0374180dc65..9071438b0ea18674ecaa7efc934630dca7ccf933 100755
--- a/api/@ohos.systemTime.d.ts
+++ b/api/@ohos.systemTime.d.ts
@@ -32,6 +32,48 @@ declare namespace systemTime {
     function setTime(time : number, callback : AsyncCallback<void>) : void;
     function setTime(time : number) : Promise<void>;
 
+    /**
+     * Obtains the number of milliseconds that have elapsed since the Unix epoch.
+     * @since 8
+     */
+    function getCurrentTime(callback: AsyncCallback<number>): void;
+    function getCurrentTime(): Promise<number>;
+
+    /**
+     * Obtains the number of nanoseconds that have elapsed since the Unix epoch.
+     * @since 8
+     */
+    function getCurrentTimeNs(callback: AsyncCallback<number>): void;
+    function getCurrentTimeNs(): Promise<number>;
+
+    /**
+     * Obtains the number of milliseconds elapsed since the system was booted, not including deep sleep time.
+     * @since 8
+     */
+    function getRealActiveTime(callback: AsyncCallback<number>): void;
+    function getRealActiveTime(): Promise<number>;
+
+    /**
+     * Obtains the number of nanoseconds elapsed since the system was booted, not including deep sleep time.
+     * @since 8
+     */
+    function getRealActiveTimeNs(callback: AsyncCallback<number>): void;
+    function getRealActiveTimeNs(): Promise<number>;
+
+    /**
+     * Obtains the number of milliseconds elapsed since the system was booted, including deep sleep time.
+     * @since 8
+     */
+    function getRealTime(callback: AsyncCallback<number>): void;
+    function getRealTime(): Promise<number>;
+
+    /**
+     * Obtains the number of nanoseconds elapsed since the system was booted, including deep sleep time.
+     * @since 8
+     */
+    function getRealTimeNs(callback: AsyncCallback<number>): void;
+    function getRealTimeNs(): Promise<number>;
+
     /**
      * Sets the system time.
      * @permission ohos.permission.SET_TIME
@@ -41,6 +83,13 @@ declare namespace systemTime {
     function setDate(date: Date, callback: AsyncCallback<void>): void;
     function setDate(date: Date): Promise<void>;
 
+    /**
+     * Obtains the system date.
+     * @since 8
+     */
+    function getDate(callback: AsyncCallback<Date>): void;
+    function getDate(): Promise<Date>;
+
     /**
      * Sets the system time zone.
      * @permission ohos.permission.SET_TIME_ZONE
@@ -49,6 +98,13 @@ declare namespace systemTime {
      */
     function setTimezone(timezone: string, callback: AsyncCallback<void>): void;
     function setTimezone(timezone: string): Promise<void>;
+
+      /**
+     * Obtains the system time zone.
+     * @since 8
+     */  
+    function getTimezone(callback: AsyncCallback<string>): void;
+    function getTimezone(): Promise<string>;
 }
 
 export default systemTime;