The invention relates to an anti-theft alarm remote network snapshooting and monitoring device based on a traffic signal controller. The anti-theft alarm remote network snapshooting and monitoring device comprises an alarm information acquisition controller, wherein a front door travel switch for detecting whether a front door is illegally opened, and a rear door travel switch for detecting whether a rear door is illegally opened are respectively mounted at corners close to the front door and the rear door, of a box body; a front door camera and a rear door camera are respectively mounted at the upper part, corresponding to the front door and the rear door, of the box body; output ends of the front door travel switch, the rear door travel switch, the front door camera and the rear door camera are all connected with the input end of the alarm information acquisition controller; the output end of the alarm information acquisition controller is connected with the input end of a network video service controller; the network video service controller is in bidirectional communication with a background monitoring platform through a wired/wireless network. When cabinet doors are illegally opened, the cameras can be rapidly powered on to snapshoot images, and the images can be rapidly uploaded to the background monitoring platform before lawbreakers cut off the power, so that video evidence can be provided for solving criminal cases later.