Abstract: Conventional security inspection system is equipped with a map judge at each security inspection spot. The map judge of each X-ray machine is independent of each other, and problems exist such as insufficient workload for map judge personnel and waste of human resources. Based on the network design of security inspection system of urban rail transit, the centralized map-judging function is proposed for the first time. Through functions such as real-time transmission of X optical and video images, flexible allocation of tasks in map assignment, and centralized manpower dispatching, less manpower is needed for meeting the requirements of security inspection and mapjudging, acheiving the goal of reducing personnel and increasing efficiency. The new security inspection system based on network centralized map judgement has been launched at Guangzhou Tower station of Guangzhou Metro for test, and the effect is remarkable, providing precious experience for popularizing the system in the lines newly built in 'Thirteenth Five-Year' duration of Guangzhou Metro.