To provide techniques to prevent deterioration in the processing efficiency of station service processing involving calculation of a fare.SOLUTION: A server selection functional unit 20c selects a host server to be requested for calculation of a fare from a plurality of fare adjustment determination servers 1 connected via a network in a data communication available manner. A fare calculation request functional unit 20a requests the host server selected by the server selection functional unit 20c to calculate the fare. A fare adjustment processing functional unit 20b executes fare adjustment using the fare calculated by the host server to which the fare calculation request functional unit 20a requested calculation of the fare.SELECTED DRAWING: Figure 3
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