An embodiment includes a mobile object server and a registration server. The mobile object server is receives information from each of a plurality of mobile objects within a geographic space and performs a process associated with each mobile object. The mobile object server performs processes by mobile object agents associated with the plurality of mobile objects. The registration server registers a first additional process that is to be performed in addition to a first basic process common to the plurality of mobile objects. The first additional process is associated with one mobile object. The registration server registers the first additional process with one mobile object agent. The registration server registers the first additional process and a call-up condition by the one mobile object agent. The mobile object server calls up the first additional process in response to the call-up condition being satisfied during performance of the one mobile object agent.