Earth’s interior is working this way-answering the 10<sup>th</sup> problem proposed by “Science” journal
Materials all over the world are doing opening-closing movement. The thermal (heat energy) derived upward movement of material can be defined as opening, while the potential gravity of derived downward sinking movement be defined as closing. Opening-closing movement obtains the synchronized unity between vertical and horizontal opening-closing and the properties of interdependence, mutual opposition and transformation. So that, under the control and regulate of rotating movement it transforms all Earth material, tectonics and energy etc. from the state of disorder to be ordered, and finally built up the dynamically stable equilibrium system of opening-closing-rotating tectonics. Therefore, the unceas-ingly cyclic evolution of formation, destruction and renovation of the dynamically stable equilibrium system is the only basis and effective method for the research on the working of the Earth’s interior. For that, we have delineated 8 vertical-ly opening-closing tectonic cycles and the Earth crust spherical opening-closing tectonic cycle. And preliminary estab-lished the 4-dimensional working system of the Earth. The establishment of the dynamically stable equilibrium system is fulfilled in accordance with the 4 long term standing natural laws, such as, the gravity or mass balancing criteria, the min-imum internal energy principle in crystallization, geometric preferred orientation growth principle and principle of horizon-tal material homogeneity. Among them gravity balancing is the leading law. Nearly at about 4.0 Ga mantle lithosphere was formed as a lid covering the hot Earth and preliminarily built up the stable opening-closing-rotating tectonic system which made the Earth entering the evolution stage of dynamically stable equilibrium system. After that, each important geological event (lose balance) is not thing but poking a hole or tearing a fissure to destruct the balance of the Earth. The rotating movement and opening-closing movement will soon restore it to a new balance and thus formed an open-ing-closing cycle. Till now Earth has passed 5 megacycles. Plate tectonics studied the regularity of how did the litho-spheric mantle be poked and how did it be restored only for the youngest 4 cycles and then summing up as a theory. Therefore, it is restricted both in time and space and is unworthy to be titled as “global tectonics”. Earth is a living body, the working system in which including inner structure and its function is rather perfect, including: opening-closing movement, rotating movement and the lose balance movement to compose the movement system; Geo-fluids functioning as “blood”, Earth nucleus is the “ heart” for storing and supplying ”blood” and the mantle plumes connecting “bloods” comprised the “blood” system. Taking gravity balance as a criteria, the Earth’s dynamic equilibrium system is composed of: 4 gravity balance surfaces, 4 opening-closing transforming zones and the 2 mass balance lines on the surface of the sphere. Because the transformation of opening and closing has the function of spontaneous form-ing and self-adjusting, therefore, the interdependence, mutual opposition and transformation of opening and closing are the major dynamic mechanism and major motivation for the working system of the Earth’s interior. The essence of the change is the transformation of thermal energy to potential energy. The driving mechanism of the transformation is the destruction of opening-closing equilibrium by lose balance movement. The internal cause is the supercritical explosion induced by high temperature and pressure fluid and the external cause is mainly impact process.