A power control apparatus is provided that includes a calculation unit, a detection unit, a storage unit, a selection unit and an execution unit. The detection unit detects whether a required spare capacity is short, based on the required spare capacity, the spare power, and the total spare power capacity. The storage unit stores power control operation items. The selection unit selects power control operation items if the required spare capacity is short. The execution unit executes application operation of one or more the power control operation items until the required spare capacity becomes available, and executes waiting operation of one or more power control operation items executing the application operation if the required spare capacity is available.