The invention discloses an inertance and capacitance device with a high inertance-mass ratio characteristic. The device comprises a gear box, a housing which is fixedly installed below the gear box, aplanetary gear assembly and a solar gear assembly which are movably installed on the gear box through rotary arms, a rolling bead nut which is in threaded connection with the outer side of a rollingbead lead screw section of the solar gear assembly, a rolling bead spline shaft which is fixedly connected with the rolling bead nut through a bolt and a rolling bead spline shaft which is in cooperation connection with the rolling bead spline shaft. According to the device, a single degree-of-freedom rotary gear system is composed of the planetary gear assembly, the solar gear assembly and the rotary arms, when the rolling bead spline shaft moves up and down relative to the housing, the rolling bead nut of the rolling bead spline shaft is driven to move by the rolling bead spline shaft, the rolling bead lead screw shaft is driven to rotate by the rolling bead nut, the single degree-of-freedom rotary gear system is driven to move by the rotation of the rolling bead lead screw shaft, an acceleration function is achieved, the transmission ratio is high, extremely high inertance coefficient can be achieved, and a high inertance-mass ratio can be achieved.