Card payment system and method using a tablet mobile communication device

PURPOSE: A credit card payment system and method are provided to enable a user to make credit card payment securely by using a tablet mobile communications device equipped with a near field communication (NFC) function, thereby improving the convenience of a customer and an affiliated store. CONSTITUTION: A tablet mobile communications device (4) is equipped with an NFC function and performs radio frequency identification (RFID) reading for a credit card (2) or a mobile credit card. An application program containing a client module is downloaded through wireless internet communications and installed at the tablet mobile communications device. The tablet mobile communications device decrypts the information of the credit card or the mobile credit card, for which RFID reading was performed, and requests payment from a payment company server. A secure application module (SAM) processing server (24) authenticates the application program. The SAM processing server provides a decryption key decrypting credit card information or mobile credit card information to the tablet mobile communications device. [Reference numerals] (10) RF transceiver; (14) Application(client module); (2) Credit card; (24) SAM processing server; (30) Biller server; (6) Wireless communication part; (8) NFC reading part; (AA) Mobile card; (BB) RF card block information; (CC) Application authentication(customer, affiliated store); (DD) Card access(authentication key); (EE) Decryption key; (FF) Payment authorization request; (GG) Authorization information