Only a limited number of service servers have been provided with the function of feeding back profits obtained through cooperation of multiple service servers to developers of cooperation modules and business entities running the service servers as incentives. In the present invention, a cooperation server for achieving cooperation between the service servers includes: a business entity data storage means for storing business entity data of the respective service servers; a cooperation module storage means for storing cooperation modules used for achieving cooperation between the service servers; a developer data storage means for storing developer data related to developers of the cooperation modules; a cooperation history storage means for storing cooperation history data of the cooperation modules; and an incentive settlement means for performing calculation of amounts of incentives and payment of the incentives.
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