Abstract: A new control system composed of base-isolated structure equipped with transducer is proposed. The control system can transform part of earthquake energy into hydraulic energy, which can be stored in an accumulator and used as active control power supply. A theoretical model of the control system is established and the energy transition efficiency and structural control effect of the system are discussed. Numerical simulation for a base-isolated frame structure is carried out by Simulink. The results show that the new control system has high energy transition efficiency, and the lower the damping of the isolation floor, the higher the energy transition efficiency. The input earthquake acceleration intensity has obvious effect on the energy transition efficiency. With high acceleration peak value of the earthquake excitation, the energy transition efficiency reaches 70 percent or more. Compared with the general base-isolated system, the new system has nearly the same control effect while the displacement of the isolation floor is reduced by nearly a half.