Abstract
In this study, we examine the formation process and the requirement of various usage of road space after the introduction of the regulation on road space usage through the case studies of two types of road at Xi'an city in China. As the results, the following are made clear. 1)the various form of activities appear on the street as a public space, based on people's various and indispensable activity needs. 2)These various form of activities on street space have been connived though it is illegal as for juridical because the systemof self-management in the district exists.