Abstract: For the complex geomorphic condition of forest districts, the application of Geographic Information System(GIS)in forest monitoring and management system showed great conviniences to daily management such as forest fire positioning, terrain observation, distance measuament and so on. Video monitoring system was one of the most efficient and economical systems used in monitoring and preventing forest fire at home and abroad these days. Thus a GIS integrated with video monitoring system was designed, and the function was developed that 2D map, 3D scene and video monitor screen could display the same target area and could control each other. New system has been successfully applied in BaiLang-Forest of Inner-Mongolia Province. The practice shows that the system is an efficient management platform．

Key words: GIS, ArcEngine, monitoring system, forest fire, DEM, 3D