Abstract: GIS technology has been widely applied to the area of urban planning and disaster reduction. But it still turns out to be short of immersion sense into virtual environments. This paper proposed a methodology of fully interacting VR and AR technology in GIS. Following a description of the VR and GIS technology, it introduced the prototype of disaster management system with the method of VR/AR combined with GIS. It also discussed the key issues of the methods, and introduced the application of the integrated system to tsunami disaster management. This system not only provides a strong support for disaster emergency response and risk management, but also broadened the application field of GIS、VR and AR technology.