An electronic device includes a camera module, a user interface module, a display module and a detection module. The electronic device continuously captures face image of face areas of a user in response to entering a menu selecting mode, displays an initial face image divided into a plurality of face regions relationships between the face regions and menus on the display module. The detection module notifies the user interface module the selected face region that is selected according to hand placement of a hand of the user on a corresponding face area of a face of the user for more than a predetermined timer period. Then the user interface module determines a menu of the current content that corresponds to the selected face region is selected corresponding to the relationships between the face regions and the menus.