CMS-MX(CDMA Mobile System-Mobile eXchange) software has a large-scale and needs frequency chanbes to adopt new functions. Therefore, an efficient version management is necessary for the software. General-purpose version management system are not suitable for the CMS-MX software, which consists of various types of files and has its own development method. In this paper, we present a version management system for the CMS-MX software. The version management system provides file registration control. version control, and information management on the basis of software configuration and soft ware developer information in accordance with CMS-MX software developement procement process. It has characteristics such as full file storing, file verification, and association with software integration process.