Extensity is one of the basic attributes of architecture. The building space is of practicability. It is an architecture form by using some architecture methods and combination ways according to the need of the activity. The architecture＇ s form have embady visualize. The instrument and combination creat it. The building space is a compound and all- round conception. It＇s difficult to take a kind of specifical reference as the unified standard classify standard. Naturalness factor and artificial factor are two causa...
