Natural disasters are not only by geomorphologic, geologic and hydrogeologic conditions but also by vegetation and artificial civil workings. These conditions can be evaluated qualitatively based on aerial photography analyses and field surveys. The quantitative evaluation of natural slope stability is carried out using digital elevation models (DEMs) and high-resolution satellite imagery. In the homogeneous geologic condition area, DEMs can detect the geomorphologic features involved in natural disasters, and satellite imagery can evaluate vegetation. Therefore, we consider that natural slope stability is estimable by a combination of geomorphologic attributes calculated from DEMs and vegetation indices obtained from satellite imagery.