The invention provides an energy-storing system of an energy-storing electrically operated device, which comprises a supporting seat, and an operating mechanism, a reducing mechanism, an energy-storing mechanism and an energy-releasing mechanism which are arranged on the supporting seat, wherein the energy-storing mechanism and the energy-releasing mechanism lead the energy-storing electrically operated device to switch between an energy-storing state and an energy-releasing state. The energy-storing and the energy-releasing both depend on a cam to drive a spring to compress or release. The invention has simple and reliable structure and lower cost, realizes the technical excellent matching of a handle of a plastic shell circuit breaker to indicate the working state of the circuit breaker, fills up the blank of domestic technology, and has strong popularization meaning.