This paper presents the design, implementation, and experimental evaluation of an autonomous line-following robot developed for efficient material transportation in dynamic industrial environments. Unlike conventional line-following robots that focus only on path tracking, the proposed system integrates automatic lighting control, onboard thermal management, and access security as core operational functions. These additional features enable the robot to maintain reliable performance under variable lighting and temperature conditions while preventing unauthorized use in shared workspaces. The navigation system is based on five TCRT5000 infrared sensors, which provide accurate line detection and stable maneuvering along complex trajectories, including sharp 90-degree turns. To enhance environmental adaptability, the robot automatically activates its lighting system in low-light conditions and employs a temperature-regulated cooling mechanism to protect onboard electronics and sensitive payloads. An access control layer is also incorporated to improve operational safety and reduce tampering risks. Experimental results demonstrate that the proposed robot achieves reliable path-following performance and robust subsystem response under different operating conditions. The combination of precise navigation, environmental adaptation, and security functions makes the system a practical and scalable solution for industrial automation and internal logistics in modern factory settings.