To easily and surely collect price, in place of money collection with visiting or transfer of the price to a bank account.

A debit card or the like, having cash drawing function, is used to purchase a prepaid card 3. In settlement by this prepaid card 3, the price is transferred from a settling bank to an account of a store 12, on the basis of settlement data sent to the setting bank from a bank D with which the store has the account. Prior to this transfer, purchase information data given in accordance with purchase of a commodity is confirmed via a portable telephone 14.