Considering the disadvantages of single air source heat pump and single solar energy heater,a solar-air double heat sources heat pump system was proposed.The influence of solar radiation intensity on the performance of the whole system was briefly analyzed.The results of the comparative experiment between solar assisted heat pump system and air source heat pump system show that both the performance and water heating rate of solar assisted heat pump system are better than those of air source heat pump system in the whole heating process.The average coefficient of performance COP of solar assisted heat pump system is 3 times higher than that of air source heat pump system.Solar assisted heat pump has obvious advantages in relative to the air source heat pump in winter environment.