The research focuses on investigating part of the rainfall disaster area to comprehend the relationship between social, physical vulnerability and social resilience as well as the possibility of deconstructing the given disaster spatial unit. Therefore, we undertook the in-depth interviews in some villages and communities, and induced the significances of the role of social vulnerability. Accordingly, we try to discuss that how we consider both of social and physical vulnerability and social resilience to re-construct the spatial unit? Regarding to the research methods, we sorted the disaster area according to 3 disaster degrees via Soil and Water Conservation Bureau, Council of Agriculture, Executive Yuan, selected 4 villages belonged to 1^(st) degree and 5 villages belonged to 3^(rd) degree in Nantou and Taichung of Central Taiwan. In-depth interview was adapted and 75 households were selected in the fieldwork. The contents of interviews were transferred to texts and took the thematical analysis to discover the relationship between social vulnerability, social resilience and physical vulnerability. To the research finding, the social vulnerability and resilience which reverses the degree of physical vulnerability, however, they are not seen as the important factors in the resource distribution and community development after disasters. Moreover, this research makes the 2 spatial units in Shengmu Villiage. According to the result of thematical analysis based on 20 interviewees, it presents the spatial aggregation of social vulnerability. The north and south divided by the converging point of 3 rivers, the north one shows the social vulnerability of young people who are facing the limited chances, and the south one reveals the social vulnerability of middle-old age group who suffering from the unstable profits of agricultural products. Our research values the social vulnerability and resilience in redraw the spatial units for disaster prevention. Moreover, either pursuing the smaller spatial units or following the present one is not the suitable way for disaster prevention. It is more important to analysis the traits of social vulnerability and resilience of the specific area, then finding out the appropriate spatial unit.