In this study, the methods for flood vulnerability index is proposed for the East Asia including Thailand where the extreme flood had occurred in 2011. Thailand was selected as the representative country in the East Asia. AHP method which is pairwise comparison was applied for the flood vulnerability analysis. The differences and difficulties between Thailand and Korea was analyzed in terms of the data availability and flood characteristics. As as result, the experts in Thailand answered that

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... e exposure components such as geometric and rainfall characteristics were more important in flood vulnerability, while exposure, adaptative capability, and sensitivity have almost equal weight in Korea. The total rainy season precipitation was the most important factor in Thailand survey results, but the Maximum daily rainfall has the highest weight in Korea. These differences should be considered in the flood vulnerability analysis.