diff --git a/api/@ohos.application.Configuration.d.ts b/api/@ohos.application.Configuration.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..ff9681efa86f38eba6bb42ebb0fdee2b3cdb1ebe
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+++ b/api/@ohos.application.Configuration.d.ts
@@ -0,0 +1,34 @@
+/*
+ * 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.
+ */
+
+/**
+ * configuration item.
+ *
+ * @name Configuration
+ * @since 8
+ * @sysCap AAFwk
+ * @devices phone, tablet, tv, wearable, car
+ * @permission N/A
+ */
+export interface Configuration {
+    /**
+     * Indicates the current language of the application.
+     *
+     * @since 8
+     * @sysCap AAFwk
+     */
+    language: string;
+}
+
diff --git a/api/@ohos.application.abilityManager.d.ts b/api/@ohos.application.abilityManager.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..5ced77d93ed97c548af8f67b02a1a760a72c33eb
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+++ b/api/@ohos.application.abilityManager.d.ts
@@ -0,0 +1,40 @@
+/*
+ * 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';
+import Configuration from './@ohos.application.Configuration';
+
+/**
+ * The class of an ability manager.
+ *
+ * @since 8
+ * @sysCap AAFwk
+ * @devices phone, tablet, tv, wearable, car
+ * @permission N/A
+ */
+declare namespace abilityManager {
+    /**
+     * Updates the configuration by modifying the configuration.
+     *
+     * @devices phone, tablet, tv, wearable, car
+     * @since 8
+     * @SysCap AAFwk
+     * @param config Indicates the new configuration.
+     * @systemapi Hide this for inner system use.
+     * @return -
+     */
+    function updateConfiguration(config: Configuration, callback: AsyncCallback<void>): void;
+    function updateConfiguration(config: Configuration): Promise<void>;
+}
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