The smart torque controller serves as the central brain of the entire smart tightening system, primarily responsible for precise control, process management, data logging, and system integration. It ensures each fastener connection achieves the required reliability and consistency as specified in the design, minimizing human error to the greatest extent possible. By providing detailed process data, it enables transparency, traceability, and continuous improvement throughout the production process. Widely applied in fields demanding high assembly quality—such as automotive manufacturing, aerospace, precision instruments, and medical devices—it stands as an indispensable key device in modern smart manufacturing and quality management.