PROBLEM TO BE SOLVED: To receive and pay money from an account advantageous to a customer by linking the plural accounts. SOLUTION: An account information management means 2 manages information relating to the accounts opened in the plural financial institution processors 1a and 1b by the same customer and a priority setting means 3 sets priority to the accounts managed in the account information management means 2. At the time of receiving a processing request for operating the money information of the account of the customer, a processing object account selection means 4 selects a processing object account in the descending order of the priority out of the accounts opened by the customer. A money information operation means 5 successively executes operations corresponding to the processing request to the account selected by the processing object account selection means 4. With such a payment system, even when the customer who opens the accounts in the plural financial institution processors does not especially specify the account at the time of receiving and paying money, the processings of receiving and paying the money or the like are performed to the account advantageous to the customer.
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