Abstract: Abstract: In this paper, the solar coupled proton exchange membrane fuel cell (PEMFC) cogeneration system was constructed by combining solar energy with fuel cell in order to realize multi-energy complementary utilization with storing solar energy in another energy source for user at night and cloudy day. The observation stations were set up to measure solar meteorological parameters day and night according to the test requirements of solar meteorological parameters in the heating and power cogeneration system. The test platform of low temperature solar collectors/air source heat pump hot water system was set up to study operation parameters of hot water system. The simulation models of proton exchange membrane fuel cell (PEMFC) and solar cooling water were established by using Matlab/Simulink simulation software. The simulation results showed that PEMFC stacks output voltage could be effectively raised by increasing the number of single cell and hydrogen partial pressure. PEMFC stacks operation temperature could be cut down by increasing the PEMFC stack output voltage and current but it also prolonged the PEMFC stack start-up time. The inlet and outlet temperature of circulation cooling water for PEMFC stacks was 45-55 ℃. When inlet and outlet temperature of circulation cooling water for PEMFC stacks was 50-55 ℃, the inlet and outlet temperature of solar cooling water was 40-45 ℃, the operation temperature for PEMFC stacks was 80.47 ℃, hydrogen reaction rate was 0.015 4 mol/s, and the reasonable range of heat efficiency in plate heat exchanger was 0.5-0.9. The experimental results showed that the average temperature of water tank was 45.55 ℃ and the operation temperature of the heat pump was 40 to 45 ℃ in low temperature solar collectors/air source heat pump hot water system. The variation interval of the total average temperature for the low temperature solar collectors/air source heat pump hot water system was 44.24 to 46.94 ℃ during the worst test period of solar energy environment in winter snow day. The feasibility of solar circulation cooling water was verified by experimental result that was accordance with circulation cooling water temperature interval of proton exchange membrane fuel cell. The study results of experiment and simulation showed that the low temperature solar collectors/air source heat pump hot water system which control temperature was 40-45 ℃,which can continuously absorb thermal energy of circulation cooling water in proton exchange membrane fuel cell and ensure the normal operation of cogeneration system.