Abstract: Provided is a high-voltage equipment cooling system for electric-powered vehicles, which is capable of sufficiently cooling a DC/DC converter as well as a battery. The high-voltage equipment cooling system is equipped with: a battery assessment unit which assesses a battery cooling method suitable for cooling the battery on the basis of the temperature or the amount of heat generated by the battery; a DC/DC assessment unit which assesses a DC/DC cooling method suitable for cooling the DC/DC converter on the basis of the temperature of the DC/DC converter; a determination unit which determines a final cooling method on the basis of the results assessed by the battery assessment unit and the results assessed by the DC/DC assessment unit; and a control unit which controls an IPU fan on the basis of the final cooling method determined by the determination unit.