diff --git a/api/@ohos.userIAM.faceAuth.d.ts b/api/@ohos.userIAM.faceAuth.d.ts
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+/*
+ * Copyright (c) 2022-2022 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.
+ */
+
+/**
+ * This module provides the capability to manage face auth.
+ *
+ * @since 9
+ */
+declare namespace faceAuth {
+    /**
+     * Provides the abilities for face authentication.
+     * @name FaceAuth
+     * @since 9
+     * @syscap SystemCapability.UserIAM.FaceAuth
+     * @systemapi Hide this for inner system use.
+     */
+    class FaceAuthManager {
+        /**
+         * Constructor to get the FaceAuthManager class instance.
+         *
+         * @since 9
+         * @return Returns the FaceAuthManager class instance.
+         * @systemapi Hide this for inner system use.
+         */
+        constructor();
+
+        /**
+         * Set XComponent surface id for camera preview during enroll.
+         *
+         * @since 9
+         * @param surfaceId Indicates surface id for face enroll preview.
+         * @return Operation result.
+         * @systemapi Hide this for inner system use.
+         */
+        setSurfaceId(surfaceId: string): ResultCode;
+    }
+
+    /**
+     * Indicates the enumeration of operation result code.
+     *
+     * @name ResultCode
+     * @since 9
+     * @syscap SystemCapability.UserIAM.FaceAuth
+     * @systemapi Hide this for inner system use.
+     */
+    enum ResultCode {
+        /**
+         * Indicates that operation is success.
+         */
+        SUCCESS = 0,
+
+        /**
+         * Indicates that operation is fail.
+         */
+        FAIL = 1,
+    }
+}
+
+export default faceAuth;
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