An electronic device and a display thereof are provided. The electronic device includes a display and a supporting device. The display includes a display panel, a back cover, and a connecting member. The back cover is disposed on the display panel, and includes an inner surface, an outer surface opposite to the inner surface, and a mounting hole penetrating the inner surface and the outer surface. The inner surface faces the display panel. The mounting hole is disposed on a central region of the back cover. The connecting member is disposed on the inner surface at a position corresponding to the mounting hole, and includes a screw hole. The supporting device includes a detachable fixer connected to the screw hole. Thus, it is convenient for a user to connect the display to different supporting devices.