In the shop POS register terminal, the settlement request
generating unit generates settlement request information including an amount of settlement upon
receipt of an operational input of IC card settlement; and the request
barcode generating unit generates a request
barcode from the settlement request information, and causes the POS register terminal to display on the screen or to print for output. In the
cell phone, the request
barcode restoring unit images the request barcode by the camera; the IC card settlement unit subtracts the amount of settlement of the restored settlement request information from the value charged to the IC
chip of the
cell phone; the settlement response
generating unit generates settlement response information including a balance after settlement of the IC
chip; and the response barcode generating unit generates a response barcode from the settlement response information, and causes the
cell phone to display the same on the screen. In the POS register terminal, the response barcode restoring unit reads out the response barcode to restore the settlement response information; the IC card settlement ending unit confirms the end of the IC card settlement from the restored settlement response information, and causes the POS register terminal to print the
receipt for output.