The invention discloses a parking space guiding and reverse vehicle searching system and a method. The parking space guiding and reverse vehicle searching system comprises a parking space and licence plate identifying and positioning device and an inquiry terminal, wherein the parking space and licence plate identifying and positioning device further comprises a center data server, a licence plate identifying computer, a site controller, a guiding screen, a parking space lamp and a camera, wherein the center data server is connected with a vehicle identifying computer by an Ethernet, the licence plate identifying computer is connected with the site controller by the Ethernet, the site controller is connected with the camera, the parking space lamp and the guiding screen, and the center data server is also connected with the inquiry terminal by a wired network or a wireless network. By adopting the technical scheme disclosed by the invention, a parking space guiding system and a reverse vehicle searching system can be combined into a whole; and moreover, the structure is simple, the manufacturing cost is low, and the problems of parking difficulty, vehicle searching difficulty and the like are also solved effectively.