Abstract: The objective of the present invention is to provide an agent system in which it will not be necessary to respecify the destination and in which the dead time entails in specifying the destination will be minimized. Agent generating unit in the system agent generates mobile object with its attached routing list which indicates the object's destination. MPU converting unit converts agent to MPU code. Intermediate code converting unit changes to intermediate code, and outputs to the next communication device. In the communication device which received the agent, the MPU converting unit converts the agent to MPU code. Agent restoring unit restores the agent of MPU code to the original agent, and stores it in the memory area.