A parking management system including a rail is described. A camera module takes images of a parking area, has a chargeable battery, and moves along the rail using a motor and wheels. A charging and AP module charges the camera module, receives image information from the camera module, and is movable using a motor, a running rail and gears. A server processes the image information received from the charging and AP module. A computer is connected to the server, and contains management software which executes a parking situation search using a database of the server. The camera takes images from the parking area while moving along the rail, and is positioned on the charging rail so as to be charged from the charging and AP module.