This research is to develop an expert system utilizing virtual reality and 3D image technologies for minimizing damages from natural disaster, especially storm and flood, which could be used as a training kid for people including the old. It also develops an expert system for storm and flood on very limited region, 3D animation application technology using optical motion capture techniques for heavy storm and flood, and 3D-based rendering technology using virtual reality techniques. This data based expert system should work exactly like real experts by adapting all expert knowledge and experience, so that users, especially the old and vulnerable residents not familiar with computer systems, could easily use the system by several button selections. The animated character based program will also be developed for the old and vulnerable residents to learn and understand what to do quite easily.