Abstract: The step dam development in Jianzha county of the Yellow river Has caused most of the frontage of landslides to be submerged. Old coll apses and landslides lost stability. Some new collapses and landslides will be produced. This brings direct threat to production and living of the local people and seriously influences sustainable social and economic development. In this study the types, quantity and manifestations of existing geologic hazards in the urban study area and the interrelations between geologic hazards and geological environment term were ascert ained rapidly by using the remote sensing technique, thus offering an accurate and reliable basis for the prevention and control of geolo gical hazards in the area. The application of the remote sensing technique yielded good results.