“Taking the ground floor of the city as a project space” is a concept translated from French “(ré)aménager les rez-de-chaussée de la ville” which means re-amending the city’s ground floor. Ms. Ariella Masboungi, a famous French architect-planner who initiated the concept, emphasized that it has great functional significance in achieving pedestrian-friendly, promoting economic sustainability, and revitalizing the ground floor by the ground floor is taken as a project space in terms of urban projects practice. With three-dimensional development of the city, the ground floor space has turned from a single ground-level to a multi-level three-dimensional system connecting the the space above, on and under the ground.