The invention discloses an advertisement display device. The advertisement display device comprises an alarm, an energy storage power supply, a playing unit used for playing advertisement information,and a control switch, wherein the control switch is connected with the alarm, the playing unit and the energy storage power supply separately; and when the playing unit is disconnected with an external power supply, the control switch is closed, and the energy storage power supply drives the alarm to give an alarm. According to the advertisement display device, the problem that the it cannot be found in time when the advertisement display device is stolen can be solved, the alarm unit is controlled by the control switch to give an alarm to remind people around, and the device is particularlysuitable for private places such as toilets, bathing places and the like which cannot be monitored by a closed circuit television.