A method for controlling a user interface of an electronic device by providing for the benefit of a user a projection of an operating interface includes a projection device to project an operating interface on a surface and controlling a detecting device to detect control operations on the projected interface by the user. A type of the user's control operation is determined, wherein the types of the control operations can include gestures and touch operations. The electronic device is controlled to perform a function in response to the touch operation or the gesture operation.