PURPOSE: A thermal storage cooling system using a closed circuit is provided to reduce a maintenance step by replacing a sensible heat liquid circulating pipe and an indoor radiator with a cooling pipe for heat transfer and an indoor unit of an air conditioning type. CONSTITUTION: A thermal storage cooling system using a closed circuit comprises a refrigerating part(110) and a cooling part(120). An ice-making refrigerant, which circulates in a first closed circuit, has the evaporation and liquefaction reaction by the heat exchange with outside and the pressure change in the cooling part. The liquefaction reaction of the heat transmission refrigerant is performed by absorbing the heat using the cooling part. A cooling piping offers the movement route of a heat transmission refrigerant.
