Digital signage displays monitoring device

A monitoring device for a digital signage which has a digital signage display, a digital signage player with a network device, and a management console, comprising:

• a controller with two ends having a predetermined program installed therein;
• a detector with a or a plurality of sensors being attached to a predetermined position of the display, and connecting with one of the ends of the controller;
• a connector connecting with the other end of the controller and the player respectively;
• wherein the controller sends a detecting signal to the player via the connector, and the player transmits the detecting signal to the display;
• the respective sensor detects the detecting signal on the display, and sends a feedback signal to the controller;
• the controller compares the detecting signal to the feedback signal with the predetermined program, analyzes the comparison, and generates a result to indicate the display being in normal condition or out of order;
• a warning message corresponding to the result is sent to the manage console via the network device.