With the social and economic development, people's living standards improve, more and more cars have been entered homes, autos, consumer age has quietly come, parking lot construction is in full swing, but at the same time to increase parking, car park management has not been a corresponding increase, the current most intelligent management of the parking lot remain in the import and export management, the main emphasis on vehicle safety and management fees, and the management of the garage is still in the exploratory stage. Parking in the actual process, we often find, in some large commercial parking lot in order to find a parking space, drove back and forth in which waste a lot of time, but also the traffic congestion caused by the garage, parking and low efficiency, motorists parking in the delay time, but also caused economic losses to the yard. In view of this, many parking spaces the owners have realized the importance of guidance, a number of large car park in the parking lot has also started trying to install parking guidance system.