Historic buildings, which carry collective memories of Taiwanese, have gradually disappeared. The preservation and reuse of historic buildings have become Taiwan’s new paradigm of architectural discourses and practices. The preservation and reuse of historic buildings, suggesting emancipation and transformation of public spaces, have become the dominant trend of socio-cultural development in Taiwan. They are not only the transformation of the spatial functions, but also an important perspective of socio-cultural development. They are the spatial practice process of the “lived conservation” mechanism. Moreover, they are the linkage between local identity and residents. This works uses the “Pinetum Hostel” in Hualien, Taiwan as an example and adopts related discourses of historic buildings, reuse, and local identity to explore the preservation of historical buildings with regard to the transformation of future spatial reform. The Pinetum Hostel used to be the office of the Naval Administration in the Japanese colonial period. This site was taken by Taiwanese government in the wake of the end of WWII. It is the only Japanese military remains preserved in good condition in Hualien. On July 13, 2000, Hualien County Government officially classified the Pinetum Hostel a “Special Historic Attraction Zone.” This work will use literature review, in-depth interview, and iconographic approaches to investigate the relationships between local identity and historical building preservation. Furthermore, this work will explore cultural image behind the preservation and reuse of historic buildings. Finally, this work suggests a reflexivity movement for the preservation and reuse of historic buildings.