Geothermal energy is an important type of renewable energy. It can be easily mined at low cost, and has the advantages of no pollution and recycling utilization. The exploitation of geothermal energy can bring about significant economic, social and environmental benefits. The base for geothermal energy exploitation is the exploration of geothermal field. Analysis of the geological background of regional structure and heat control, collect adjacent areas geological data in Inner Mongolia with the use of electromagnetic sounding.