In order to meet the market demand and give users more choices, the parking lot system has many intelligent functions to meet the use of different places, create a good parking environment for people and make people parking safer. Intelligent parking lot system combines modern advanced technology and products to realize intelligent management of vehicles. It has a wide variety and complex functions. We can equip different parking lot equipment according to people's requirements and on-site environment. At present, for vehicle management in parking lots, license plate recognition is widely used. For example, in some large parking lots, communities, institutions and other places, intelligent license plate recognition system can track and capture vehicles and improve people's parking safety. The high-performance and multi-functional parking lot system has a good market prospect and great application space and potential, which has played a positive role in promoting the intelligent transportation in China. Intelligent parking lot system is a set of intelligent equipment integrating video acquisition, vehicle detection, license plate recognition, voice number reporting, intelligent analysis of recognition results, automatic alarm, remote duty and remote monitoring. The whole process does not need manual processing, so that car owners can realize non-stop operation, save time and improve the efficiency of vehicle entry and exit management. The process of social development and modernization is very fast, and the number of cars in the city is also increasing, resulting in the increasing traffic flow in the parking lot. Naturally, the intelligent parking lot system will be used more and more in life and play a more and more important role.