| 摘要 |
PROBLEM TO BE SOLVED: To pay a price anywhere without imposing a burden on a user. SOLUTION: A cellular phone 1 is mounting a memory (unillustrated) storing a payable amount, and when a holder of this cellular phone 1 does shopping at a store, a selling device 2 confirms the payable amount in the cellular phone 1, and demands payment of a price to a designated bank 3 of this cellular phone 1 when this amount is larger than the paying price. Thus, this designated bank 3 subtracts this paying price from an account of the cellular phone 1, transfers the price to an account of a designated bank 4 of the selling device 2, simultaneously informs this paying price to the cellular phone 1, and renews the payable amount by subtracting this paying price. The payable amount of the memory of the cellular phone 1 can be increased by subtracting from an account of the designated bank 3. |
