The 2026 6th International Conference on Control Theory and Applications (ICoCTA 2026) was successfully held in Qingdao, China during October 23–25, 2026. It was organized by Shandong University of Science and Technology, hosted by the College of Electrical Engineering and Automation of Shandong University of Science and Technology, co-organized by the School of Control Science and Engineering of Shandong University, the School of Automation of Qingdao University and the School of Robotics and Automation of Nanjing University, and technically co-sponsored by IEEE, IEEE Control Systems Society, and IEEE Systems, Man, and Cybernetics Society. More than 200 participants attended ICoCTA 2026 and delivered oral presentations.