Prediction of potential landslide area without any detectable surface features is of great importance to land resources investigation, land use planning, and engineering geological studies. However, because of its complexities in nature, no systematic and method has yet been developed. The present study analyzes the particular geomorphological and geological conditions which are regarded essential to the occurrence of each type of landslides. Those factors that are found to be present in every kind of landslides are then selected as parameters for engineering environmental geoloical mapping. And the land unit whose of which the combination of the parameters form the conditions for certain type of landslides is regarded as the potential area for that type of landslide to occur under adequate triggering forces. The applications of the results to the environmental impact assessment of slopeland development are also discussed.