An information processing device includes: one or more information processing device main bodies; a first heat exchanger configured to cool air to be introduced into the one or more information processing device main bodies; an air blower configured to introduce the air into the one or more information processing device main bodies; an evaporator through which discharged air discharged from the one or more information processing device main bodies passes; a receiving pan configured to receive water generated by dew condensation in the first heat exchanger; and a water supply member configured to supply the water in the receiving pan to the evaporator.