Parking space monitoring system and space detector being suitable for a parking lot comprising a plurality of parking spaces and comprising a network switch and a plurality of space detectors

This invention discloses a parking space monitoring system which is suitable for a parking lot comprising a plurality of parking spaces, which comprises a network switch and a plurality of space detectors. The space detectors are respectively arranged in front of the parking spaces and are electrically connected to the network switch in a daisy chain way; each of the space detectors is used for detecting at least one of the parking spaces and comprises an image module, a communication module and a control module electrically connected with the image module and the communication module; the image module is used for shooting the parking spaces and intercepting a corresponding image; the control module is used for receiving the image shot by the image module and outputting a signal related to the use condition of the parking space after judging and identifying the image; and the signal is transmitted to the network switch by the communication module. The space detectors are respectively electrically connected to