Utilizing Using satellite and terrestrialgravity, surface gravity, Earth tide data and other geophysical observationsed data, the lithospheric and mantle’s structures, the mass movement and the dynamic mechanism of mantle are studied. The viscous structure and dissipation of the mantle are analytized. The near diurnal vibration and rotation of the inner- and outer-cores are revealed. And the coupling relations between core and mantle, and inner core and outer core are investigated.