In Thailand, many small-scale architectural heritages scattered in local temples are neglected by government agencies and scholars. Their protection and development have become an issue worthy of consideration at present. The study selected Pho Chai temple with an architectural heritage in Khon Kaen Province of Northeast Thailand, as a case study, conducted qualitative research through in-depth interviews and participant observation, tried to examine the historical appearance of the architectural heritage of the temple, combined with the current social issue of the aging society and the health promotion of the monks and villagers, and re-planned and designed the environment around the architectural heritage to renovate its vitality, which not only provides a distinctive exercise space for monks and villagers to keep their health in daily life but also become an iconic cultural space carrying the history and cultural memory of the village. Meanwhile, because of its proximity to the urban area, the study proposed Pho Chai temple could be combined with Chai Sri temple in the same village to form mutual development between architectural space and folk activities, which could greatly enrich the local tourism resources to highlight the outstanding local values, and then be incorporated into the culture tourism circle of Khon Kaen Province. This will lead to complementary advantages and common sustainable development between urban and communities.