The Yun-Chia Area, Taiwan has faced the threat of land subsidence and sea-level rising, which increases the danger of disasters. If the main primary industries (agriculture and fishery) in Yunlin Country are taken into consideration, these issues will become more severe. Through the literature review, this study analyzes whether social vulnerability affects biophysical vulnerability. Furthermore, this study establishes a general framework of social vulnerability, and combines statistical data to analyze vulnerability in the township/city level in Yunlin County. Using the GIS mapping technique, including the land subsidence map, the potential flood map and the sensitive landslide map of Yunlin County, this study analyzes mapping results of social vulnerability and biophysical vulnerability. Study results show that Lunbei Township, Mailiao Township and Sihhu Township, all located in the coast area, have higher social vulnerability scores than other townships. Moreover, these three townships exhibit higher potential dangers of land subsidence and flood. On the other hand, Douliou City with a low social vulnerability score and a little biophysical vulnerability faces lower vulnerability than other townships/cities and thus becomes the largest settlement in Yunlin County. Different townships/cities have different disaster prevention programs and responsive attitudes and capacity. Therefore, social vulnerability analyses provide a diversified perspective and can be adopted as a planning tool in future development planning and design.