To reduce facility expenses or communication expenses by dispensing with a telephone or public network communication control part provided for each automatic transaction device.

When an operation abnormality is detected in transaction such as cash payment which is performed in response to a customer's operation in an automatic transaction device 1 set in a shop such as a business branch, failure information and reference destination information which are encoded and displayed in the transaction device 1 are read by a portable terminal 12. The portable terminal 12 transmits the failure information to a reference server 5 shown by the read reference destination information, and the reference server 6 returns countermeasure information extracted from an illustration content database 7 based on the received failure information to the portable terminal 12 to display it on the portable terminal 12.

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