The utility model discloses a homothermal cooling water automation equipment of high accuracy is applicable to the technical field who needs cooling device in the industry, and the first circulation water route of refrigerated is carried out including providing to equipment to its structure, be formed by connecting including first supply tank, main working shaft, reserve working shaft, electronic three -way control valve, electric contact pressure gauge, working equipment, still including the second circulation water route that provides the refrigerating output, indirect heating equipment connected in the middle of first circulation water route and second circulating water sweetgum fruit were crossed, and second circulation water route includes that middle indirect heating equipment, second supply tank, circulating water pump, reserve circulating water pump, frequency conversion refrigerating unit are formed by connecting, still include the running water emergency water way and the generating set that provide under the power failure condition, automatic operation is realized by PLC control to the entire system device. This practical new installation has that equipment is simple, temperature control is accurate, automated control, resources are saved, safe and reliable's advantage.