This case is the imitated European type residential building that left idle for ten years originally, the design purpose regards this building as a simple and pure good, residential space. After many interpretations of the site, the designer simplified everything from the point of view of function, and started from the pure state. Within the existing architectural boundaries, the space was involved in order to break the established state. From inside to outside, the current state is presented by reorganizing the relationship between size, height and depth of space.