Remote sensing technology applying in the investigation of geological hazards is powerful timeless and economic and convenient. So RS has become an important means of geological hazard survey. To ascertain the development characteristics and distribution rule of geological hazards in Datong county, Qinghai province. The research built a three-dimensional visual platform of remote sensing interpretation based on GF-1, LANDSAT8 OLI and DEM data. And then conducted a comprehensive geological hazard survey focusing on landslide and debris flow for Datong county. The remote sensing characteristics and distribution characteristics of geological hazard body were described in detail. 399 spot geological hazards were interpreted which including 6 spot collapse, 100 spot landslides, 54 spot ancient landslide, 87 spot debris flow, 140 spot unstable slope and 12 spot dangerous scarp steep cliff. Better results were obtained through the application of field verification.