In recent years, wireless local area networks (WLANs) have attracted attention for use as communication infrastructure that is robust against the effects of a disaster. Telephone lines cannot be used because of congestion accompanying rapidly increased demand after a disaster. Because WLANs can be used in such cases, WLAN is effective for infrastructure during times of disaster. An important difficulty is dead spots, which occur from a breakdown of access points (APs) after a calamity in the event of a disaster. Inside of a dead spot, we cannot make contact with the exterior. Therefore, such spots are extremely dangerous. One solution is the establishment of a new Wireless Communication Path (WCP) from adjoining AP with a radio relay machine. For this study, we propose a disaster-robust system that establishes a WCP quickly without human power using a robot with agent technology.