With the increasing demand for energy in the world

accelerating the exploration of renewable energy utilization technologies is of great significance in alleviating energy shortages. Compared with other renewable energy sources

geothermal energy has great potential for power generation

heating and comprehensive utilization. Selecting a reasonable way to classify and efficiently develop and utilize multi-level geothermal resources is a hot topic in recent years in the world. This paper gives an overview of the development history and application methods of geothermal energy

focusing on the direct use of geothermal energy technology

different grades of geothermal power station technology and geothermal comprehensive utilization technology

systematically combing and summarizing

and summarizing different geothermal energy development and utilization technologies. Corresponding characteristics and applicable geothermal environment. Finally

the factors that need to be considered for the rational development and utilization of geothermal energy are discussed

and the development trend of geothermal energy future research is prospected

which provides a reference for the in-depth research and commercial development of geothermal energy.