This paper introduces a remote control system of the parking lot, detecting the parking situation of the parking by infrared device, using 8031 of mcs51 series monolithic integrated circuits as the subordinate computer, dealing with the parking signals detected by infrared device, then transmitting them to upper computer through RS-485 bus, and monitoring every partition of the parking by PC camera. Building the dynamic picture of upper computer by configuration software, make it possible to control and dispatch the parking remotely and totally, improving the management system of the parking.