As interests in “region” and “community” have increased recently, various efforts have been made to rediscover and revitalize the values of regions and communities. Local community members form relationships, interact with others, and participate in the planning of local activities. The Jang-wi Urban Regeneration Zone was the target of this study. It was divided into the Community Enhancing Projects and Urban Regeneration period from 2013 to 2018, and comprehensive analysis of the causal relationship between local activities based on period and the regional causal relationship during the entire period. For the Community Enhancing Projects period, local activities of Resident-led were drawn as essential activity factors, and for the urban regeneration period, local activities from urban regeneration projects were identified as essential activities. Overall, residents’ ordinary activities were the cause of the Community Enhancing Projects period, which influenced public-led planning activities. However, when the two periods were combined, various autonomy activities of residents in the previous period significantly influenced most residents’ ordinary activities and public-led planning activities. Therefore, various attempts to regenerate the community through public projects require project plans and implementations that reflect the organic linkage with residents’ existing activities. In addition, reinforcing residents’ capabilities through public projects can be a driving force for building a sustainable community even after the public projects are terminated. For the reasons, long-term support is needed.