Abstract: In this research, an automated screw fastening robot system for container floors is designed and implemented, aiming to resolve the issues of low efficiency, high labor intensity, and safety deficiencies resulting from the long-term dependence on manual operation in the container floor screw fastening process. The system integrates a mobile chassis, a multi-joint robotic arm, a high-precision visual positioning module, an end-effector, and an automatic screw feeder for automated identification, positioning, and fastening of screw holes. A mechanical model is constructed to guide the development of a pneumatic fastening device. Experimental results demonstrate that the visual module achieves a 96.5% recognition rate for unfastened holes, with mean positioning errors of 0.50 mm (X-axis) and 0.47 mm (Y-axis). The feeder delivers screws in 0.21 seconds at pressures above 0.35 MPa, enabling a total fastening cycle time of 4.5 seconds per screw. The system proves stable, significantly enhancing operational automation, efficiency, and consistency, thereby offering a viable solution for intelligent upgrading in container manufacturing.