This book constitutes the refereed proceedings of the 6th China Intelligent Robotics Annual Conference on Intelligent Robotics, CIRAC 2025, held in Nantong, China, during September 20&22, 2025. The 12 full papers and 3 short papers presented in this volume were carefully reviewed and selected from 26 submissions.  They are grouped into the following topics: UAV Technology; Robot Mechanism & Control; SLAM & Visual Navigation; Medical Robotics & Perception; Robotic Radar Perception.