To provide a debit settlement system by which convenience of a user utilizing play facilities can be enhanced and debit settlement realizing high security can be executed, and a debit settlement method for purchasing a prepaid card.

Cash card information is read by setting a carrier having a non-contact type IC card function to a debit terminal 106. A PIN number and a designated amount of money to use to the cash card information are inputted by using the carrier or the debit terminal 106. The debit settlement is executed at a financial institution 112 via an information processing center 110 and CAFIS 111 on the basis of the information. A prepaid card, whose amount of money is equivalent to an issued amount of money of the prepaid card settled corresponding to the designated amount of money to use, is issued.