The invention relates to a solar energy device with heat pump temperature compensation and defrosting functions and belongs to the technical field of solar energy and heat pumps. The solar energy device comprises a circulating controller (1), a solar energy working medium circulating line (10), a phase change heat storage water tank (9), a solar thermal collector (8), a heat pump working medium circulating line (2), a compressor (7), a heat supply water tank (5), a heat exchanger (3) arranged in the heat supply water tank (5), a cold water inlet pipe (6) and a hot water outlet pipe (4), wherein the cold water inlet pipe (6) and the hot water outlet pipe (4) are arranged on the heat supply water tank (5), and the solar thermal collector (8) is connected with the phase change heat storage water tank (9). The circulating controller (1) and the solar energy working medium circulating line (10) form closed cycle, and the heat pump working medium circulating line (2) and the solar thermal collector (8) are connected with each other and form another closed cycle through the compressor (7) and the heat exchanger (3). The solar energy device has the advantages of being simple in structure, saving energy and solving the problem that the surface of the thermal collector frosts and freezes.