Active and passive constant-temperature water tank based on solar driving

The invention provides an active and passive constant-temperature water tank based on solar energy driving, which belongs to the technical field of water tanks, and comprises a heat preservation shell, a solar energy device, a control circuit, a water inlet and outlet device, a tank body internal environment sensor, a pipe orifice sensor, an electric heating wire and a roller shutter device, the water inlet and outlet device is arranged on the side edge of the heat preservation shell. The solar heat absorption and heat preservation layer is arranged on the periphery, heat energy can be absorbed when the external temperature is high, heat transfer from the inside to the outside is blocked when the external temperature is low, a one-way heat preservation device is formed, and the specific implementation mode is that the heat absorption coating is coated on the surface of the box body, and solar energy or other external energy can be actively absorbed under the condition that the sun is sufficient in the daytime