An aspect of the disclosure is to determine a watch face image, and an operation method of an electronic device according to various embodiments may include: acquiring an image using a camera of the electronic device; displaying a watch face preview matching the acquired image on a display of the electronic device; determining a watch face image from the watch face preview; controlling a transceiver of the electronic device to transmit the watch face image to a smart watch; and applying the watch face image to the smart watch.