A shelving unit includes a shelving unit body, a guide rail, and a movable gantry. The shelving unit body includes multiple warehouse levels disposed at intervals along a height direction of the shelving unit. Each warehouse level has multiple warehouse positions disposed along a length direction of the shelving unit. The corresponding warehouse positions in different warehouse levels form warehouse columns disposed along the height direction. The guide rail is connected to the shelving unit body, and the guide rail is configured to extend along the length direction. The movable gantry is located at a side of the shelving unit body, and the movable gantry is movably connected to the guide rail. The movable gantry is configured to extend along the height direction of the shelving unit, and the movable gantry is configured to dock with or detach from a goods retrieving or depositing device.