Water source heat pump is a new clean energy, and its use is not only capable of year-round stable operation, and low running costs, no pollution. But the actual use of the new technology but it has some limiting factor. (1) by the available water conditions. Water source heat pump is theoretically possible to use all water, in fact, the actual project cost differences between water use is quite large. So if in different regions have the right to become a key water source heat pump applications. The current use of water source heat pump mode, the closed system is generally higher cost. The open system, the ability to find the right use of water source heat pump water becomes restrictions. Off systems, water temperature must meet certain requirements, water and cleanliness. (2) limited by the geographic configuration of the water layer. For pumping from underground recharge, you must take into account the geological structure of the use of the land, make sure you can find a suitable water supply wells in the economic conditions, but should also consider the local geology and soil conditions to ensure the water with tail Recharge can be achieved. (3) Restricted investment economy. Due to the various different areas, different users and national energy policy, the impact of fuel prices, the basic conditions of the water; one-time investment and operating costs will be as different users and different. Overall, though, the higher the efficiency of water source heat pump and low cost. However, compared with the traditional method of heating air conditioning and refrigeration, different needs in different regions under conditions of water source heat pump investment economy will vary. So if we want to use the water source heat pump system, we need to survey the site is suitable for the construction of the use of water source heat pump systems.