The number of dispatch rules set to each dispatcher is reduced in an event processing system.An event processing system includes a distribution controller 100 and a plurality of dispatchers 300. To each of the plurality of dispatchers 300, dispatching target attribute information, that is attribute information included in an event 601 that is a dispatching target for the dispatchers 300, has been assigned. The distribution controller 100 sets a dispatch rule 604 including a dispatch condition indicating one or more conditions of attribute information included in an event 601 and a destination of an event 601 that satisfies the dispatch condition to the dispatchers 300, to which the dispatching target attribute information matching any one of the conditions of attribute information included in the dispatch condition of the dispatch rule 604 has been assigned, among the plurality of dispatchers 300.