A freezer power calculation unit calculates power consumption Wc of a freezer, based on a heat exchanging amount Q of an electronic device and a performance coefficient COP_c of the freezer. An apparatus performance coefficient calculation unit calculates an apparatus performance coefficient ACOP, based on a calorific value Q of the electronic device, Wc, and power consumption Wf of an air conditioning blower unit. Note that the apparatus performance coefficient ACOP is a performance coefficient of an apparatus including an evaporator, a condenser, a heat exchanger, the freezer, and the air conditioning blower unit. A blower rotational speed control unit controls a rotational speed r of the air conditioning blower unit, based on the apparatus performance coefficient ACOP. A coolant temperature control unit controls a first coolant temperature Tin being a temperature of coolant COO flowing from the freezer, based on the apparatus performance coefficient ACOP.