The solar water heating system is composed of five parts: solar collector, pipeline circulation system, water storage tank, automatic control system and auxiliary heating system. By installing solar collectors on the south facade or courtyard lawn of the villa, hot water can be delivered to every floor of the villa.The system adopts secondary heat exchange, and the hot water produced in the water tank is clean and hygienic, free of impurities and pollution.The system is fully pressurized, fully automatic operation, safe and reliable, free from freezing, fouling, leakage and other problems, and easy to maintain.