The tectonic setting of Capital area is extremely complex in east China. The paper uses method of wavelet multi-scale to separate local bouguer gravity anomaly information of the capital area, and take analysis of bouguer gravity anomaly on multi-level, including lateral and long directions. Relations are established between these phenomena and geological structures, and the detailed geologic explanation are also given for their presence. Emphasis is put on analysis of 3 groups of bouguer gravity anomaly, which have distinct features on nearly all images with different orders. Of those two with NE strike and one with NWW strike. The paper studies the anomaly and its geological body, also the depth distribution of crystal, to inverse the development of tectosome. Research finds that the three groups of bouguer gravity anomaly are corresponding to three tectonic systems in capital area, which are Taihang Mountain Tectonic Zone, Cangxian Tectonic Zone and Zhangjiakou-Bohai Tectonic Zone. All those are composed of different sub-tectosomes of each, including active fault, depression and uplift. By studies we consider the piedmont thrust fault of Taihang mountain to be a discordogenic fault, which is the geophysical boundary of Huabei Basin and Taihang Mountain Range. The left two tectonic zones are still active since Cenozoic Era. The crust structure in intersection areas of two NE-striking and NWW-striking tectonic zone are most complex, two seismic belts are formed there. And more work should be carried on there in quite a long time. By studies, We can get more knowledge about active structures systems and crust structure of Capital area. All these will supply important information for future studies of rocky crust and mantle structure in Capital area.