The planning and construction of Lujiazui Central District were essentially completed in the 1990s, and since then, this area has become an important financial central district in China. However, as the public center of the city, Lujiazui Financial District currently struggles to provide daily public activity space for citizens, highlighted by the presence of single-function, insufficient public buildings and the inaccessibility of open spaces. We conducted an analysis of the characteristics of Lujiazui Central District space and carried out a relevant case study to explore the strategies of adding a dimensional function to the mixing degree, creating public spaces in high-rise buildings, improving transport links, and using other methods to reconstruct the built environment. We also proposed related public policy suggestions, so as to stimulate the vitality of people in Lujiazui and create better services for public life.