Abstract: In order to guide and regulate science underground engineering geological environmental technology, improve underground engineering geological environmental protection efficiency, one Underground Engineering Geology Environment Information Systemdatabase platform NET platform based on GIS platform is designed and implemented in Chongqing City. B/S mode and.NET technology is adopted in this system design, with C# as the primary development language SQLserver2012 as the back-end database server andapplication of MapServer and Openlayers technology to realize the map publication and display. The system could realize bothnetworking and visualization of underground engineering geology environment information management, and thus contribute to an intuitive, dynamic information service in research and development of Chongqing city underground engineering, management of ecological environment and geological environment protection.