A vehicle cooling system comprising: a plurality of heat-exchange target electric devices that are mounted on a vehicle and perform heat exchange with a heat exchange medium; a wire harness that is electrically connected to the heat-exchange target electric devices; a high-voltage battery that supplies power to heat-exchange target electric devices that drive the vehicle among the plurality of heat-exchange target electric devices; a heat consuming device that consumes heat of the heat exchange medium; electric device medium pipes (141, 143, 144, 145) that are routed along a routing path of the wire harness and are used for circulation of the heat exchange medium through the heat-exchange target electric devices; characterized in that the vehicle cooling system further comprises: an electrical junction box that is electrically connected to the wire harness and the high-voltage battery; a battery medium pipe that is used for circulation of the heat exchange medium through the high-voltage battery; and a path switching unit to which the electric device medium pipes (141, 143, 144, 145), the battery medium pipe, and the heat consuming device are connected so that the heat exchange medium is circulatable and that forms a heat exchange medium path in which the heat exchange medium is circulated through at least two of the plurality of heat-exchange target electric devices, the high-voltage battery, and the heat consuming device, wherein the path switching unit is provided in the electrical junction box and forms the heat exchange medium path according to a heat generation state of the heat-exchange target electric devices. a plurality of heat-exchange target electric devices that are mounted on a vehicle and perform heat exchange with a heat exchange medium; a wire harness that is electrically connected to the heat-exchange target electric devices; a high-voltage battery that supplies power to heat-exchange target electric devices that drive the vehicle among the plurality of heat-exchange target electric devices; a heat consuming device that consumes heat of the heat exchange medium; electric device medium pipes (141, 143, 144, 145) that are routed along a routing path of the wire harness and are used for circulation of the heat exchange medium through the heat-exchange target electric devices; characterized in that the vehicle cooling system further comprises: an electrical junction box that is electrically connected to the wire harness and the high-voltage battery; a battery medium pipe that is used for circulation of the heat exchange medium through the high-voltage battery; and a path switching unit to which the electric device medium pipes (141, 143, 144, 145), the battery medium pipe, and the heat consuming device are connected so that the heat exchange medium is circulatable and that forms a heat exchange medium path in which the heat exchange medium is circulated through at least two of the plurality of heat-exchange target electric devices, the high-voltage battery, and the heat consuming device, wherein the path switching unit is provided in the electrical junction box and forms the heat exchange medium path according to a heat generation state of the heat-exchange target electric devices. an electrical junction box that is electrically connected to the wire harness and the high-voltage battery; a battery medium pipe that is used for circulation of the heat exchange medium through the high-voltage battery; and a path switching unit to which the electric device medium pipes (141, 143, 144, 145), the battery medium pipe, and the heat consuming device are connected so that the heat exchange medium is circulatable and that forms a heat exchange medium path in which the heat exchange medium is circulated through at least two of the plurality of heat-exchange target electric devices, the high-voltage battery, and the heat consuming device, wherein the path switching unit is provided in the electrical junction box and forms the heat exchange medium path according to a heat generation state of the heat-exchange target electric devices.