Where to have regeneration and where to give it a priority are the basic questions need to answer in urban regeneration.Based on clarifying the defined method,this article aims at probing into the scope and the priority of regeneration-space.Then,a further survey of it from the angle of time and an analysis of the regeneration-space were carried out combined with the current situation of China.In order to reach a clear understanding of the space program of the city regeneration for a scientific decision for regeneration and raising the efficiency.