Decentralizing management of base station, unifying database of base station, optimizing network & providing support, improving processing speed of a client network management system for base stations, all of above is the new requests from customer, which raised the issue of the development of PHS cell site management system.This article first introduced the current situation of base station network management as well as the background and significance of the topic, then described the original constraints of the base station network management system and the new customer demand for the base station maintenance. Based on a detail analysis to the new requests from the user of CSMS, network environment, function requirement, maintenance analyses, the article proposed a new software modular structure and completed the software modeling. In addition, it also described in details on the selection and establishment of the new system database and the structure. Finally, it indicated the feasibility of the software system through the illustration and description of the network management contracture, the software architecture and the functional modules.