To provide a two-power supply type battery loading vehicle having a single fan type cooler which can suppress an increase in a size of a cooling fan and an increase in a power consumption while complicating a circuit configuration.

The temperature of a vehicle loading high-voltage battery 11 and the temperature of a DC/DC converter 15 for a low pressure battery power supply are detected. A microcomputer 142 and the DC/DC converter 15 which perform the temperature management of the high voltage battery 11 are integrated. The cooling fan 13 for cooling commonly the high voltage battery 11 and the DC/DC converter 15 is controlled to be driven based on the detected temperatures.