Abstract: This paper introduces the working principle of multifunctional air source heat pump experimental system,carries out the calculation of the cooling load and the amount of hot water of the laboratory air condition, and designs the experimental test system.Through the experimental method, the power, cooling capacity and COP of multifunctional air souce heat pump under different operation mode are obtained.The coefficient of thermal performance and refrigeration performance of the unit are 3.84 and 3.25, respectively.The experimental results show that the multi-functional air source heat pump experimental system design is feasible.