The residual chlorine sensor and liquid level sensor of the chlorine replenishment equipment monitor the residual chlorine and water level of the water tank in real-time, and the data processing system stores and analyzes the monitoring data; When the residual chlorine is lower than the set value, the production control system starts, first calculates the amount of sodium hypochlorite that needs to be produced, and then starts the built-in sodium hypochlorite generator to produce the calculated amount of sodium hypochlorite; After the production is completed, the dilution control system starts the first level dilution equipment to operate. After the first level dilution is completed, the dilution control system starts the second level dilution equipment to operate. At the same time, the dosing control system starts the dosing equipment to operate. After two levels of dilution, the concentration of the sodium hypochlorite disinfectant solution drops to a safe concentration range below 2MG/L. The dosing equipment quickly adds it to the water tank. The sodium hypochlorite disinfectant solution added to the water tank diffuses to increase the residual chlorine in the tap water to a certain extent, achieving that the residual chlorine in the effluent of the water tank is always maintained above the required concentration; Real time monitoring of the normal operation of each component system.