Water storage and cooling technology is to take advantage of the price difference between peak and valley electricity prices on the power grid and use the low cost electricity at night to store cold in the pool through the chiller, and then release the stored cold into the air conditioning system during the peak electricity price hours during the day. The advantage of this technical route is that it can make full use of the original water storage facilities, fire fighting pools, etc., reducing project construction costs, while allowing dual use of heat storage and cold storage.