Communications network damage resulting from a large disaster causes difficulties in the ability to rapidly understand the current situation and thus make appropriate decisions toward mitigating problems such as where to send and dispense emergency supplies. The research outlined in this paper focuses on the rapid construction of a network after a disaster occurs. This study suggests ZigBee and geographic information systems (GIS) technologies to resolve these problems and provide an effective communications system. This project has worked up bigger and bigger! Currently, some researchers from other countries are participating this project, such as, University of Tsukuba, Curtin University, University of Adelaide and Chonnam National University. They agree with my proposal which is useful just after the big disaster.