The reuse of architectural heritage is the basis of embodying its core value, bringing new life to heritage architecture, and is an important way to integrate it into contemporary development. In many current studies, the reuse of architectural heritage focuses on the research framework of reuse and the most effective method for the reuse of a certain building. In the whole process, the post evaluation strategy of reuse based on specific cultural background is ignored, and the reuse of heritage buildings is a dynamic process. Therefore, this study takes 9 heritage sites along the central axis of Beijing (including three types of single buildings, architectural complexes, and historical and cultural blocks) as examples, uses literature retrieval, analytic hierarchy process, and fuzzy comprehensive evaluation to extract the factors that affect the reuse of architectural heritage, and provides evaluation methods and strategies for the reuse of architectural heritage. Finally, a post evaluation framework for the reuse of architectural heritage is formed, which guides the relevant decision-making and optimization process.