Abstract: In this paper,a GSM network coverage optimization system is developed in visual C++ development environment,which is based on the COST-231 and hata models,and fits for various kinds of communication environment. The paper outlines the design of system and the implementation of algorithm,detailedly discusses the programming implementation process of downward inclination and pitching angle that was seldom discussed about,implements the automation of coverage regions optimization detecting,emulating,analyzing and optimizing,solves the coverage problem of precise evaluating in GSM network environment,and achieve the goal to optimize the GMS network.