To facilitate payment from a payer to a claimant through network banking service.

A mobile telephone set 30Y of the claimant Y acquires transfer destination account specification information from an account information storage part 54 and a transfer amount of money from a key input part 38 through a bar code display part 521 and generates a two-dimensional bar code C obtained by coding those pieces of information and displays it at a display part 36. A mobile telephone set 30X of the payer X reads the two-dimensional code C by a bar code scanner 40 and decodes the two-dimensional bar code C by a bar code reader 522, and once the decoded information is passed to a browser program 50, the browser program 50 accesses a network banking server 10 to make a request for transfer from an account of the payer X to a transfer destination account of the claimant Y according to the decoded claim information.