A stacker crane consists of a mechanical structure (including upper and lower beams, load platform, mast, drive system, fork mechanism, and safety devices), an electrical system (electrical components, distance measurement and positioning system, communication system, detection system, and control system), and auxiliary systems (power supply, guide rails, etc.).

By mechanical structure: single-mast stacker crane, double-mast stacker crane, multi-mast stacker crane: For special or extra-large capacity applications; By fork type: single-deep, double-deep, multi-deep stacker cranes, single-position, double-position, multi-position stacker cranes; By rail type: straight rail stacker crane, curved rail stacker crane, rail-changing stacker crane; By application scenario: ambient temperature, low-temperature, high-temperature, explosion-proof, anti-static, etc. By load type: tote-type stacker crane, pallet-type stacker crane, cylindrical load stacker crane, long-bar material stacker crane, wide-panel load stacker crane.