PURPOSE: To rationally and surely select and execute a using order in accordance with the use by preliminarily giving card classification selecting data to a liquidating machine and reading information of magnetic stripes thereafter to process it in accordance with the selected card classification.

CONSTITUTION: Various preset information are loaded down from a higher-order host device to a liquidating machine main body. These information include magnetic stripe processing priority level selecting information. A card reader 20 is provided with plural magnetic heads which read magnetic stripes while allowing a prescribed-sized card to pass. Information are read out of the magnetic stripe in a prescribed position of the card. Magnetic stripe information read by the card reader is transmitted to the liquidating machine main body 10. The liquidating machine main body 10 processes magnetic stripe information transmitted from the card reader 20 in accordance with the program loaded down from the host device.