The invention provides an intelligent water storage circular system of a solar water heater. The system comprises a solar heat collector, a temperature control one-way valve, a heat preservation watertank and an intelligent control system; the solar heat collector and the heat preservation water tank are independently separated, the solar heat collector is provided with a solar heat collector water inlet and a solar heat collector water outlet, the solar heat collector water inlet is connected with a water pump water outlet pipe through a pipeline, a water inlet of a water pump is connected with a tap water supplementing pipe and the heat preservation water tank, a first electric control valve is arranged on the tap water supplementing pipe, a second electric control valve is arranged onthe pipeline through which the water pump and the heat preservation water tank are connected, the top end of the heat preservation water tank is connected with a water outlet of the solar heat collector, the temperature control one-way valve is arranged on the pipeline through which the heat preservation water tank is connected with the solar heat collector, and a water outlet pipe is arranged onthe bottom of the heat preservation water tank. According to the intelligent water storage circular system of the solar water heater, reliability of solar hot water supply can be effectively improved,and resource waste is reduced.