Reliable crane and trolley positioning is critical for grain and oil storage tanks, where dust, moisture, temperature swings, and explosion risks challenge every motion. A well-designed system combines absolute encoders, laser distance sensors, rail-mounted position references, and PLC logic to deliver repeatable coordinates for hoisting, travel, and trolley movement. For grain tanks, accurate positioning supports even filling, sampling, aeration access, and cleaning without overloading structures. For oil tanks, it helps guide maintenance cranes, safety equipment, and inspection tools while reducing manual exposure. Anti-sway control and closed-loop feedback improve spotting accuracy, shorten cycle times, and prevent collision with tank walls, nozzles, and ladders. Explosion-proof components, robust cable management, and IP-rated enclosures are essential in hazardous areas. Calibration routines and redundancy maintain reliability despite dust buildup and vibration. Integrated HMI dashboards give operators real-time status, alarms, and maintenance records. By linking crane and trolley positioning with inventory and safety systems, facilities achieve smoother operations, lower downtime, and safer grain and oil storage. Technology selection depends on tank size, crane type, hazardous zone, and required accuracy. During commissioning, verify reference points under loaded conditions and set clear calibration intervals. This supports automated grain handling and safer oil tank inspection.