Ground source heat pump technology is the use of underground soil, surface water or groundwater temperature, by consuming a small amount of electricity, the heat in the low heat source in winter to move to the need for heating or heating in the summer can be room heat transfer to Low heat, cooling or cooling to achieve the purpose. Ground-source heat pump system is the use of shallow ground heating and cooling of new energy technologies, with clean, efficient, energy-saving features. Although the development in China has begun to take shape, there are still many problems in the process of popularization and application, such as construction quality, subsidy fund policy and government support and guidance. At the same time, ground source heat pump system is a multi-functional, HVAC and other fields, various fields of standards, there is no standard norms; ground source heat pump system is still building winter heating, summer cooling and domestic hot water supply effect, the technical performance of heat pump system with the initial investment, operation and maintenance Costs and other issues as well as building applications there are some problems to be solved. Therefore, ground source heat pump system needs overall planning, according to local conditions and gradual progress. Combining engineering energy features and hydrogeological conditions, geothermal heat pump system technology can be reasonably advanced in order to optimize energy structure, promote energy complementarity and improve energy efficiency. In recent years, ground-source heat pump systems have undergone the following stages in their development in China: In 1997, the Chinese government signed the "Sino-U.S. Geothermal Cooperation Agreement" with the United States and started to cooperate in establishing ground-source heat pump demonstration projects. By the end of 2003, according to the incomplete statistics of "Heating and Cooling" magazine, due to the rapid popularization of ground source heat pump system in the national market, all provinces and cities have applied projects of ground source heat pump system, and ground source heat pump equipment has provided nearly one hundred enterprises. Relevant national agencies started to establish promotion mechanism and industrial standard. In 2005, the Ministry of Construction formally listed ground source heat pump technology as ten new technologies in the construction industry and formulated and promulgated relevant design codes to promote the popularization and development of ground source heat pump technology. November 30, 2005, the Ministry of Construction released the national standard "ground source heat pump system engineering specifications" In 2006, the State Ministry of Finance and the Ministry of Construction to provide financial subsidies to select ground-source heat pump demonstration cities and projects nationwide. In September 2006, CCTV made a report on the application of ground source heat pump in Shenyang and Chengdu in the news network, and the state authoritative media started to pay attention. In 2007, ground source heat pump demonstration city project started.