In our country, the typhoon cause many damages of human and materials in various places every year. Therefore it is necessary to analyze widely position and scale of decomposed granite soil as grand information for preventing the damage. The author investigated the disaster by MIYAJIMA Island where occurred in 2005 by the satellite remote sensing technology. It is difficult to investigate a subsurface in this island where were appointed in the protection area and there were many restriction. Therefore this study tried to develop grand information by the satellite remote sensing technology and predict to disaster by evaluation of the security of the slope.