The invention provides an efficient water-saving temperature control device. The efficient water-saving temperature control device comprises a water heater, a temperature sensor, a controller, an electric valve, a hot water pipeline, an infusion type water tank, a valve, a first backflow pipeline, a first check valve, a second backflow pipeline, a second check valve, a water heater water inlet pipeline, a Venturi tube, a main valve and a main backflow pipe. According to the efficient water-saving temperature control device, through the arrangement of the sensor, the electric control device, the backflow pipelines and the Venturi tube, recycling of improper-temperature flow flowing out of a water heater is achieved, the problem of waste caused by retardance of valve closing and water cutting-off is solved, and the effects of controlling the water temperature and ensuring continuous supply of hot water can further be achieved to a certain extent.