An electric power control device includes: a power consumption monitoring section for monitoring electric power consumed by an electronic device; a moving average calculation section for calculating a moving average of the power consumption of the electronic device, based on the power consumption monitored by the power consumption monitoring section; a state-of-load determination section for determining state of the operational load on the electronic device, based on the moving average calculated by the moving average calculation section; and a control section configured to control the electronic device to operate either in a restriction mode in which an upper limit corresponding to state of load determined by the state-of-load determination section is imposed, or in a restriction release mode in which the upper limit is not imposed.