Established in 1995, The State Key Laboratory of Precision Measurement Technology and Instruments is a joint laboratory of Tsinghua University and Tianjin University. It is a national key laboratory with two recognized national first-level key disciplines and their second-class disciplines. The research of The State Key Laboratory of Precision Measurement Technology and Instruments can be categorized into four major parts: laser and optoelectric measurement technology, sensing and information measurement technology, micro- and nano- measurement and fabrication technology, and quality control in manufacturing technology.