In consumer cooperative support system, control requests from multiple masters customers do not interfere. Collecting the attribute information of typical power customer, management, in the master customer EMS group to carry out the initiative in control request to send possible EMS group and the other customers, attribute information from the EMS group the collection and management, a customer cooperative supporting unit for managing the identifier of the master customer EMS group is created clusters obtained by classifying on the basis of the attribute information, corresponding to the master customer EMS allocation to the group, when the master customer EMS has reference to EMS groups in order to control request, characterized in that to limit to the EMS included a browsable EMS group to group.
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