This study proposes to improve the efficiency of victim support services based on construction of ad hoc information environment by using spatial-temporal GIS which achieves the information support to the disaster affected municipality. Cooperation with conventional back office system data can be integrated in this system environment and framework. The proposed information environment was implemented to the affected municipality in the Niigataken Chuetsu earthquake area, and the effectiveness was verified in this study. Contribution to improve the efficiency of victim support services was accepted by the municipality official, and an ad hoc system has been changed from supporting person's tool to municipality official's tool. It is clarified that the implemented ad hoc system based on dynamic topology calculation and the spacial temporal data base contributes to improve the efficiency of victim support services in the municipality of the conventional system environment.
