Communist Party of China put forward civilization construction file and aspiration of delimiting “Three Sheng Space” combined with life, ecology and production in the 18th National Congress. The basic meaning of “Three Sheng Space” aims to establish livable life space, ecological space with clear waters and blue mountains, and efficient, economical production space in accordance with urban-rural division, strengthening urbanrural management and improving human living environment. Coincidentally, the realization of China’s sustainable development strategy is similar to “Three Sheng Space”strategic development. This paper starts with elaborating concept of “Three Sheng Space”, analyzing dynamism,difference and plyability of the physical spatial scale, spatial function and space criterion corresponding to concept of “Three Sheng Space”; discussing in details based on the essentials of life, ecology and production derived from the whole urban-rural areas, rural areas and urban areas; and bringing up the delimiting conception and method of “Three Sheng Space” on such basis.