Provided is a consumer cooperation support system in which control requests from a plurality of master consumers do not conflict with each other. A consumer cooperation support apparatus collects attribute information from an EMS group that can collect, manage, and transmit attribute information of ordinary power consumers, and manages the attribute information to manage an identifier of a master consumer EMS group that issues a control request to other consumers by its own judgment. The consumer cooperation support apparatus allocates a cluster obtained by classifying consumers based on the attribute information to a group created so as to correspond to the master consumer EMS. When the master consumer EMS refers to an EMS group in order to issues a control request, the EMS group that can be referred to is limited to EMSs included in the group.
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