Mining subsidence brings enormous damages in mining area. Facing this problem, the paper proposes a solution based on integrated GIS. It takes the coal mining, terrain motion, subsidence predication, surface destruction and disaster evaluation as a whole integrated system. The solution provides an assistant decision support for mining subsidence's prevention and curing by means of classic probability integral model and GIS components model. Based on the research and analysis, a mining subsidence predication & assistant decision support system (abbreviated as MSPADSS) is developed using oriented object programming and component GIS development technology. MSPADSS is composed of five modules, i.e., data collection, mining subsidence predication, GIS graphic and attribute information management, surface subsidence damage evaluation and GIS spatial analysis & thematic mapping. All these are integrated in a whole system. Several recognitions and conclusions can be acquired through the research as follows: Firstly, prevention and curing of mining subsidence should consider many relative factors, which cover features from the bottom of the mine to the ground. Secondly, the subsidence prediction and damage evolution can be calculated and visualized synchronously by means of ComGIS developing. Thirdly, application of MSPADSS in the east of China shows that this integrated GIS solution is feasible and adoptable.