Power control can be performed for electronic apparatuses that are unable to connect to a network. A user accesses the URL of a power supply center, and downloads an application (S11). The application is downloaded for each individual electronic apparatus to be controlled. In S12, the user makes various settings. After the settings are complete, the power supply center 2 transmits a power-limiting signal (S2), and a communication device receives the power-limiting signal (S13). If it is determined in S14 that the power-limiting function is set active, the application is started in S16. In S17, the kind of the communication that has been set is infrared. If the kind of the communication is infrared, in S18, a power-limiting signal is transmitted to a target electronic apparatus via infrared communication.