Power supply systems capable of performing various modes of fee-charging are provided. A fee-charging apparatus memorizes two or more kinds of power-use-side identification information of a use side using the power supplied via the power-supply control apparatus, two or more kinds of power-supply-side identification information of a supply side supplying the power via the power-supply control apparatus, and fee-charge-target information predetermined to each of combination sets between the two or more kinds of power-use-side identification information and the two or more kinds of power-supply-side identification information. The fee-charging apparatus receives at least one of the two or more kinds of power-supply-side identification information, at least one of the two or more types of power-use-side identification information and power-use information relating to power supplied from the power supply source to the power supply target, from the power-supply control apparatus via a wired or wireless communication line. The fee-charging apparatus performs a fee-charging process based on the at least one kind of power-supply-side identification information, the at least one kind of power-use-side identification information and the power-use information.