A compatibility test of the chemical elements in the surface environment of Inner Mongolia has revealed that the 1∶200 000 regional geochemical survey can provide all kinds of geological information in the primary environment, especially the reconnaissance and prospecting information. The geochemical data quality can be ensured through data leveling processing for eliminating the major systematic errors in the test results of regional geochemical elements. Information provided by maps, such as the maps of ln(w_Cr×w_Ni×w_Co), can be used to make geochemical divisions and also serve as valuable reference for basic geological study. Based on the regional geochemical map, the authors delineated geochemical metallogenic areas of chemical elements in Inner Mongolia, which could provide important information for geochemical metallogenic prognosis.