The invention discloses a six-in-one machine stable photovoltaic power generation system, which comprises a solar energy absorption assembly for realizing a photoelectric conversion effect, an electric water heating boiler, a first circulating water pipeline, a hot water storage tank, a second circulating water pipeline, a heat exchanger, a six-in-one machine, a cold water storage tank and a third circulating water pipeline, wherein the solar energy absorption assembly is electrically connected with the electric water heating boiler, one end of the first circulating water pipeline is communicated with the electric water heating boiler, the other end of the first circulating water pipeline is communicated with the water inlet end of the hot water storage tank, one end of the second circulating water pipeline is communicated with the water outlet end of the hot water storage tank, the other end of the second circulating water pipeline is communicated with the heat exchanger, and the six-in-one machine is electrically connected with the heat exchanger and external electrical equipment. The photovoltaic system can solve the problem that photovoltaic power generation and harmonic waves cannot be stable.