The utility model discloses an elevator which is used for stacking or unstacking circulation boxes in an electric energy measuring equipment storeroom and can achieve automatically continuous and stable operation with the compact structure. The elevator comprises a rack, a stepping motor, a transmission system, a plurality of pairs of supporting bodies, a circulation box inductor and a control system, wherein the transmission system is connected to the output end of the stepping motor and comprises a pair of parallel chains, the chains at least partially and vertically extend and can synchronously move under the drive of the stepping motor, each pair of supporting bodies are fixed to the pair of parallel chains respectively and have the same height so as to support the circulation boxes, different pairs of supporting bodies have different heights, each supporting body is fixed to the chains at the pivot end through a pivot and can pivot around the pivot from the horizontal supporting position to the vertical receding position, a pressure sensor is arranged at the bottom of the supporting bodies, the circulation box inductor faces box inlets and is used for inducting the circulation boxes, and the control system is connected to the stepping motor, the circulation box inductor and the pressure sensor and enables the stepping motor to be in the starting or stopping state according to detection signals of the circulation box inductor and the pressure sensor.