Message erasing device and message erasing system

Disclosed are a message erasing device and a message erasing system. The message erasing system includes a message erasing device and a message receiving device. The message erasing device includes a device main body, a processing module and an erasing module. The device main body has an opening. The processing module is disposed in the device main body. The erasing module includes an accommodation space, a movable unit movably penetrated on the opening, and an erasing unit disposed in the accommodation space. The message receiving device is in communication link with the processing module. The device main body presses the message receiving device and erases a physical message of the message receiving device through the erasing unit, and the movable unit triggers the processing module when the erasing unit presses the message receiving device to enable the processing module to generate and transmit an erasing signal to the message receiving device, and then the message receiving device provides a removing sig