关键词: 城市设计, 旧城, 时空延续, 保护, 更新

Abstract: Due to the abundant history and cultural sense, the urban design of the old city should pay attention to the spatial and time continuity. The protection and development of the important heritages, the humanistic environment，the natural ecological environment, the style and layout of the old city, the physical left of the buildings, will generate a tremendous combined effect in the places, crate a historic and cultural attraction, which are also the goal and the impetus of the conservation and renovation in the old cities.

Key words: urban design, old city, the spatial and time continuity, conservation, regeneration