diff --git a/api/@ohos.account.appAccount.d.ts b/api/@ohos.account.appAccount.d.ts
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+/*
+ * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {AsyncCallback} from "./basic";
+
+declare namespace appAccount {
+    /**
+     * Obtains the AppAccountManager instance.
+     * @since 7
+     * @sysCap SystemCapability.Account.AppAccount
+     * @devices phone, tablet, tv, wearable, car
+     * @return Returns the instance of the AppAccountManager.
+     */
+    function createAppAccountManager(): AppAccountManager;
+
+    /**
+     * Provides methods for managing application accounts.
+     * @name AppAccountManager
+     * @since 7
+     * @sysCap SystemCapability.Account.AppAccount
+     * @devices phone, tablet, tv, wearable, car
+     */
+    interface AppAccountManager {
+        /**
+         * Adds the account name and extra information of this application to the account management service.
+         * <p>
+         * Only the owner of the application account has the permission to call this method.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account to add.
+         * @param extraInfo Indicates the extra information of the application account to add.
+         *        The extra information cannot be sensitive information of the application account.
+         * @return void.
+         */
+        addAccount(name: string, callback: AsyncCallback<void>): void;
+        addAccount(name: string, extraInfo: string, callback: AsyncCallback<void>): void;
+        addAccount(name: string, extraInfo?: string): Promise<void>;
+
+        /**
+         * Deletes an application account from the account management service.
+         * <p>
+         * Only the owner of the application account has the permission to call this method.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account to delete.
+         * @return void.
+         */
+        deleteAccount(name: string, callback: AsyncCallback<void>): void;
+        deleteAccount(name: string): Promise<void>;
+
+        /**
+         * Disables a third-party application with the specified bundle name from
+         * accessing the given application account.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account to disable access from
+         *        the third-party application.
+         * @param bundleName Indicates the bundle name of the third-party application.
+         * @return void.
+         */
+        disableAppAccess(name: string, bundleName: string, callback: AsyncCallback<void>): void;
+        disableAppAccess(name: string, bundleName: string): Promise<void>;
+
+        /**
+         * Enables a third-party application with the specified bundle name to access the given application
+         * account for data query and listening.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @param bundleName Indicates the bundle name of the third-party application.
+         * @return void.
+         */
+        enableAppAccess(name: string, bundleName: string, callback: AsyncCallback<void>): void;
+        enableAppAccess(name: string, bundleName: string): Promise<void>;
+
+        /**
+         * Checks whether a specified application account allows application data synchronization.
+         * <p>
+         * If the same OHOS account has logged in to multiple devices, these devices constitute a super device
+         * through the distributed networking. On the networked devices, you can call this method to check
+         * whether application data can be synchronized.
+         * <p>
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @return Returns {@code true} if application data synchronization is allowed; returns {@code false} otherwise.
+         * @permission ohos.permission.DISTRIBUTED_DATASYNC.
+         */
+        checkAppAccountSyncEnable(name: string, callback: AsyncCallback<boolean>): void;
+        checkAppAccountSyncEnable(name: string): Promise<boolean>;
+
+        /**
+         * Sets the credential for this application account.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @param credentialType Indicates the type of the credential to set.
+         * @param credential Indicates the credential to set.
+         * @return void.
+         */
+        setAccountCredential(name: string, credentialType: string, credential: string,
+                             callback: AsyncCallback<void>): void;
+        setAccountCredential(name: string, credentialType: string, credential: string): Promise<void>;
+
+        /**
+         * Sets extra information for this application account.
+         * <p>
+         * You can call this method when you forget the extra information of your application account or
+         * need to modify the extra information.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @param extraInfo Indicates the extra information to set.
+         * @return void.
+         */
+        setAccountExtraInfo(name: string, extraInfo: string, callback: AsyncCallback<void>): void;
+        setAccountExtraInfo(name: string, extraInfo: string): Promise<void>;
+
+        /**
+         * Sets whether a specified application account allows application data synchronization.
+         * <p>
+         * If the same OHOS account has logged in to multiple devices, these devices constitute a super device
+         * through the distributed networking. On the networked devices, you can call this method to set whether to
+         * allow cross-device data synchronization. If synchronization is allowed, application data can be synchronized
+         * among these devices in the event of any changes related to the application account.
+         * If synchronization is not allowed, the application data is stored only on the local device.
+         * <p>
+         * <b>Application account-related changes</b>: adding or deleting an application account, setting extra
+         * information (such as updating a token), and setting data associated with this application account
+         * <p>
+         * <b>Application data that can be synchronized</b>: application account name, token,
+         * and data associated with this application account
+         * <p>
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @param isEnable Specifies whether to allow application data synchronization.
+         * @return void.
+         * @permission ohos.permission.DISTRIBUTED_DATASYNC.
+         */
+        setAppAccountSyncEnable(name: string, isEnable: boolean, callback: AsyncCallback<void>): void;
+        setAppAccountSyncEnable(name: string, isEnable: boolean): Promise<void>;
+
+        /**
+         * Sets data associated with this application account.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @param key Indicates the key of the data to set. The key can be customized.
+         * @param value Indicates the value of the data to set.
+         * @return void.
+         */
+        setAssociatedData(name: string, key: string, value: string, callback: AsyncCallback<void>): void;
+        setAssociatedData(name: string, key: string, value: string): Promise<void>;
+
+        /**
+         * Obtains information about all accessible accounts.
+         * <p>
+         * This method applies to the following accounts:
+         * <ul>
+         * <li>Accounts of this application.</li>
+         * <li>Accounts of third-party applications. To obtain such information,
+         * your application must have gained authorization from the third-party applications.</li>
+         * </ul>
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @return Returns a list of application accounts.
+         * @permission ohos.permission.GET_ACCOUNTS_PRIVILEGED.
+         */
+        getAllAccessibleAccounts(callback: AsyncCallback<Array<AppAccountInfo>>): void;
+        getAllAccessibleAccounts(): Promise<Array<AppAccountInfo>>;
+
+        /**
+         * Obtains information about all accounts of a specified account owner.
+         * <p>
+         * This method applies to the following accounts:
+         * <ul>
+         * <li>Accounts of this application.</li>
+         * <li>Accounts of third-party applications. To obtain such information,
+         * your application must have gained authorization from the third-party applications.</li>
+         * </ul>
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param owner Indicates the account owner of your application or third-party applications.
+         * @return Returns a list of application accounts.
+         * @permission ohos.permission.GET_ACCOUNTS_PRIVILEGED.
+         */
+        getAllAccounts(owner: string, callback: AsyncCallback<Array<AppAccountInfo>>): void;
+        getAllAccounts(owner: string): Promise<Array<AppAccountInfo>>;
+         
+        /**
+         * Obtains the credential of this application account.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @param credentialType Indicates the type of the credential to obtain.
+         * @return Returns the credential of the application account.
+         */
+        getAccountCredential(name: string, credentialType: string, callback: AsyncCallback<string>): void;
+        getAccountCredential(name: string, credentialType: string): Promise<string>;
+
+        /**
+         * Obtains extra information of this application account.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @return Returns the extra information of the account; returns {@code null} in other scenarios,
+         *         for example, if the account does not exist.
+         */
+        getAccountExtraInfo(name: string, callback: AsyncCallback<string>): void;
+        getAccountExtraInfo(name: string): Promise<string>;
+
+        /**
+         * Obtains data associated with this application account.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param name Indicates the name of the application account.
+         * @param key Indicates the key of the data to obtain.
+         * @return Returns the associated data of the application account.
+         */
+        getAssociatedData(name: string, key: string, callback: AsyncCallback<string>): void;
+        getAssociatedData(name: string, key: string): Promise<string>;
+
+        /**
+         * Subscribes to the change events of accounts of the specified owners.
+         * <p>
+         * When the account owner updates the account, the subscriber will receive a notification
+         * about the account change event.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @param owners Indicates the account owners, which are specified
+         *        by {@link AppAccount#AppAccount(String name, String owner)}.
+         * @return void
+         */
+        on(type: 'change', owners: Array<string>, callback: Callback<Array<AppAccountInfo>>): void;
+
+        /**
+         * Unsubscribes from account events.
+         *
+         * @since 7
+         * @devices phone, tablet, tv, wearable, car
+         * @return void
+         */
+        off(type: 'change', callback?: Callback<void>): void;
+    }
+
+    /**
+     * Provides basic information of an application account, including the account owner and name.
+     * @name AppAccountInfo
+     * @since 7
+     * @sysCap SystemCapability.Account.AppAccount
+     * @devices phone, tablet, tv, wearable, car
+     */
+    interface AppAccountInfo {
+        /**
+         * The owner an application account.
+         */
+        owner: string;
+
+        /**
+         * The name an application account.
+         */
+        name: string;
+    }
+}
+
+export default appAccount;
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