A power supply controlling system including: a first power supply controlling apparatus that supplies an electric power to a device; and a second power supply controlling apparatus that supplies an electric power to another device, communicates with the first power supply controlling apparatus, and mediates communication between the first power supply controlling apparatus and a terminal device to control power supply to the device, the terminal device controlling the power supply to the device; wherein the first power supply controlling apparatus communicates with the terminal device without relaying the second power supply controlling apparatus, according to interruption of the communication between the first power supply controlling apparatus and the second power supply controlling apparatus.