Due to effects of succession typhoons and heavy rainfall, central government often invests the funds within shortest time of contingency promptly after disaster occurring to handle the planning and design project of taking precautions against natural disaster. Because the time limit of design project operating so generally were planned without many detail investigations, it was necessary to probe into the project effect and reconstruction security behind constructed. In this study, we choose

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... Meizuolyu stream watershed in Taitung County of eastern Taiwan as the research area to realize the situation and effect of setting up the control work reconstructions by inspecting, surveying and according to hydrology analysis and topography measured, and combined to carry on hydrology mathematical calculations. We adopted HEC-RAS software to make hydrology mathematical calculations, used the result to examine whether the position of each construction was proper, and finally submitted the complete of mend suggestion. The study concluded that no matter how urgent governance was, application of appropriate scientific tools to checklist designed could avoid the mistakes of the generation.