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.