A power control system includes: an information processing device including: a determining unit that determines whether to supply power to a device from a power supplying unit, based on first correspondence information, in which an output signal detected by a detecting unit of each of at least one electronic device is associated with identification information of a corresponding electronic device, received from the corresponding electronic device, and a stored second correspondence information, in which identification information to identify a power supplying unit of a power source control device that supplies power to a device is associated with identification information of each of the at least one electronic device, and an instruction unit that instructs the power source control device to supply power or to shut off power supply to a device from the power supplying unit, according to a determination result of the determining unit.