Bridge cranes travel over long spans, so reliable position feedback is essential for safe automation and efficient material handling. A long-distance positioning system for bridge cranes combines laser ranging, UWB anchors, encoder feedback, and inertial measurement to track trolley, bridge, and hoist movement in real time. The controller fuses these data streams with a robust filtering algorithm, reducing drift and maintaining stable accuracy across extended travel distances. Wireless communication sends coordinates to the PLC, crane management software, and remote monitoring platform, enabling anti-collision control, precise landing, speed regulation, and fault diagnosis. For best performance, install laser units with a clear line of sight, place UWB anchors around the runway, and calibrate the system against known reference points. In dusty, humid, or high-vibration environments, protective housings, shielding, and signal filtering improve durability and measurement stability. Compared with conventional limit switches, this positioning system supports smoother motion, shorter cycle times, and lower maintenance costs. It is suitable for steel mills, warehouses, assembly workshops, and other industrial sites. By integrating long-distance positioning with crane automation, operators gain real-time visibility, safer lifting operations, and more accurate load placement. Regular calibration and network health checks keep measurements reliable over time. This improves safety and productivity.