Interpretation and presentation is an essential component of the whole heritage conservation process. In response to the new opportunities and challenges arising from the changing perspectives on heritage conservation, the development of display technologies and the rise of cultural tourism, it becomes a challenging task for cultural heritage institutions to construct a systematic interpretation and presentation system of a cultural heritage site that can effectively communicate heritage significance and value to the public and provide visitors with positive and valuable experience. From four main aspects (site, technology, public, and education and research), this research provides a comprehensive overview of the implementation details of the interpretation and presentation system of Old Zuoying City, which is considered an unprecedented large-scale cultural heritage preservation plan in Taiwan, through participative site investigation and in-depth interviews, thereby providing a reference for the construction, implementation, and management of interpretation and presentation system at cultural heritage sites.