Karst drainage area is a regional synthesis which is made up of spatial drainage boundary,unique landform,and river system structure,as well as hydrologic dynamic processes.It has its own special drainage structure.Thus,there are complicated and diversified factors that influence the karst drainage abilities of holding water and supplying water.Besides rock,geomorphology,and vegetation,the karst basin feature is also a very important factor for holding water,conservancing water,and supplying water.DEM data were extracted from Guizhou ASTER images by applying RS and GIS.Based on DEM,TM,and CBERS,28 karst drainage areas were selected to analyze the ten main factors that affect water holding and water supplying.In addition,quantitative analysis was made for the factors.A remote sensing retrieval model was then constructed by applying SPSS and MATLAB software to data processing and analysis.Sound retrieval effects were achieved through ANOVA and test of sample regions.