Power plants operate in complex environments where moisture, steam, high voltage equipment, and long indoor-outdoor routes make reliable positioning difficult. A waterproof long-distance positioning system solves this problem by combining rugged IP68 hardware with long-range wireless communication and real-time location algorithms. The system uses anchors installed across turbine halls, pump rooms, cooling towers, coal yards, and underground pipe corridors. Workers and mobile equipment carry compact tags that resist water, dust, vibration, and electromagnetic interference. Positioning data is transmitted over long distances and displayed on a central platform, enabling accurate visibility of personnel, vehicles, and inspection teams. In an emergency, control rooms can locate trapped or isolated staff quickly and guide rescue teams along the safest route. The platform also supports geofencing, route replay, attendance checks, and maintenance scheduling. By integrating with plant safety and automation systems, the solution improves daily inspection efficiency, reduces search time, and strengthens risk control in wet and harsh zones. Designed for continuous operation, the waterproof long-distance positioning system delivers stable performance even during washdowns, heavy rain, and steam exposure. Its low-power design and flexible networking make large-scale deployment fast, scalable, and cost-effective. It is a practical foundation for smart, safe, and efficient power plant management.