This paper presents the disaster prevention and mitigation system using a small unmanned aerial vehicle (UAV) . Immediate assessments of damage information and continuous collection of information for constructing a revival plan are important for damage mitigation when natural disasters such as huge earthquakes occur. In this study, we divide the period that follows a natural disaster on the basis of three processes, and propose the use of the small UAV for gathering information in such situations. The field experiments were conducted to evaluate the proposed system employing the small UAV. From the results of our experiments, it can be concluded that the small UAV system is effective for disaster prevention and mitigation.
