Faced with two problems of energy shortage and environmental pollution, people focus on the development of renewable energy resources. Geothermal energy is the most realistic and competitive one among the renewable energy resources. Besides its reserves is abundant. Geothermal energy is widely used in many fields. Geothermal power generation technologies are introduced and whether dry stream power generation method, ORC or KC method is elected depends on the temperature of geothermal water. Geothermal heating is the simplest, most economic and most effective utilization of low temperature geothermal energy. There are also various applications in industry for geothermal energy. Geothermal water is more and more popular in health care. In addition, geothermal energy is used in planting and breeding. Cascade utilization is the most promising way for geothermal energy because the energy efficiency is the highest. Two comprehensive utilization projects are discussed in this paper. Then ground source heat pump is introduced.
