A cooling system for a vehicle that system includes a radiator disposed in a front of the vehicle, and introduced with cooling water thereinto to cool the cooling water through heat exchange with exterior air; . In addition, a first condenser is disposed at a first side of the radiator in a width direction of the vehicle and connected with the radiator via a cooling water pipe to be introduced with the cooling water, and introduced with refrigerant via a refrigerant pipe to condense the refrigerant through heat exchange with the cooling water therein. A second condenser is interconnected with the first condenser via the refrigerant pipe to be introduced with the refrigerant condensed by the first condenser, and disposed in a front of the radiator to additionally condense the refrigerant through mutual heat exchange of the exterior air introduced while driving the vehicle and the refrigerant.