Prepayment-information managing system is arranged to prevent unsuccessfully to occur, and when issuing or using payment information, temporarily cuts away although generating the communication between server in prepayment-information relay server and prepayment-information. Prepayment-information managing system (100) includes following: the prepayment-information for producing prepayment information generates server, then activates the information of generation; Prepayment-information relay server (120), one predetermined quantity of the preparatory prepayment information of its reception/storage, according to the corresponding prepayment information of the requirement transmission storage to the prepayment information from a terminal to terminal, confirm the quantity of the prepayment information of storage, then prepayment-information is requested to generate the preset amount that server sends prepayment information, if quantity is smaller or identical than or to preset amount.
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