Ground-source heat pump system using underground soil temperature or groundwater temperature characteristics of relatively stable, by inputting a small amount of high-grade energy (such as electricity), using buried in the pipeline around the building system or groundwater and building heat exchanger, low Grade heat to high quality dual-use air-conditioning system. It consists of water circulation system, heat exchanger, ground source heat pump unit and control system. Ground source heat pump system instead of the boiler in winter to remove heat from the soil to the building about 30-40 ℃ hot air heating, summer instead of ordinary air conditioning to the soil heat, to 10-17 ℃ in the form of cold to the building cooling. [Features] (1) Energy efficient (2) Green (3) Household billing (4) Long service life (5) Simple control equipment (6) Strong system reliability (7) Simultaneous heating and cooling (8) Maintenance Low cost (9) intelligent remote central control (10) flexible, safe and reliable (11) return air division, fresh air independent [Applications] commercial buildings to meet the large area, indoor air quality commercial buildings heating, cooling need. You can central heating, air conditioning, but also household measurement, easy to manage. Hospital according to the requirements of the hospital air environment, automatic regulation of heating and cooling load, to meet the special environmental requirements. Hotels and restaurants can be applied to heating, cooling load changes relatively large hotels, restaurants, to meet the bath, laundry and other hot water needs, saving a lot of operating costs. Residential, villa can be applied to heating, cooling load changes relatively large hotels, restaurants, to meet the bath, laundry and other hot water needs, saving a lot of operating costs. Swimming pool, skating rink and other sports venues for a variety of sports venues indoor heating, cooling and water supply places thermostat, can be easily adjusted and supplemented. Waste heat recovery using the field - the recovery of industrial or other waste heat can be widely used in metallurgical, power generation, food, paper, dairy processing, beer processing, bathing and other industries waste water, tail water recycling. In addition, the heat pump system can also be used in fresh water, mariculture and farming (such as heating or cooling of aquaculture water; plastic greenhouse heating, etc.).