Professor Qian’s research focused on analytical photogrammetry, image-based positioning, digital photogrammetry, remote sensing image processing, and image information systems. Over the course of his teaching career, he authored more than two million Chinese characters of teaching materials, including Fundamentals of Analytical Aerial Triangulation and Space Photogrammetry, which received First and Second Prizes, respectively, in the National Excellent Surveying and Mapping Textbook Awards. His research achievements in analytical photogrammetric positioning and related fields received recognition through national invention patents, the National Science Conference Award, PLA Science and Technology Progress Awards, and PLA Excellent Teaching Achievement Awards. He also contributed to the development of photogrammetric education and practice in China, including the establishment of specialised training in analytical aerial triangulation and space photogrammetry, the development of rapid photographic positioning equipment, and subsequent research on digital image processing and digital photogrammetric systems. His publications and research contributed to the development of photogrammetric methods, remote sensing image processing, and digital surveying and mapping technologies in China.