MLAT system has some problems such as the number of receiving stations, wide distribution of stations and complex network links, which have increased the operational risk of MLAT system and the workload and pressure of maintenance personnel. To solve this problem, the role of CMS in centralized surveillance and management of devices are studied in the paper, and the working principle of CMS is explored. The results show that CMS can monitor all the MLAT devices 24/7 and it supports the remote operation and control of the devices, which is conducive to reducing the workload and pressure of maintenance personnel and improving the stability of MLAT system.