A power supply control device includes a power conversion portion to convert AC power from a commercial power supply to DC, a control portion, a first communication portion connected to a network, a second communication portion connected to an image forming apparatus, and a device power supply switch arranged between the commercial power supply and the image forming apparatus. The control portion includes a mode decision portion to decide between a normal mode and a power-saving mode, a positional information acquisition portion to acquire positional information of the image forming apparatus, a sleep switch portion to open the device power supply switch, an activation portion to close the device power supply switch in response to a packet including the positional information of the image forming apparatus, a temporary storage control portion to temporarily store the packet, a packet transmission portion to transmit the packet, and a connection portion.