仪器是获取信息的主要手段，是信息产业的支撑。快速准确地获得多种信息是测量仪器的一大发展趋势，也是信息时代快速发展的必然要求。激光多自由度同时测量具有测量效率高、多自由度误差参数同时测量等显著优点，克服了传统激光单参数测量获取信息有限、测量效率低下等缺点，成为数控机床误差测量等领域重要的研究方向。本文按照激光单自由度测量方法到多自由度同时测量系统集成的顺序，对目前激光多自由度同时测量方法和系统进行了较全面的介绍，分析了其优缺点，并讨论了激光多自由度未来的发展趋势。

Instruments are the main means of obtaining information and the support of the information industry. Obtaining various information quickly and accurately is a major development trend of measuring instruments, and it is also an inevitable requirement of the rapid development of the information age. Laser multi-degree-of-freedom simultaneous measurement has significant advantages such as high measurement efficiency and simultaneous measurement of multi-degree-of-freedom error parameters. It overcomes the shortcomings of traditional laser single-parameter measurement, such as limited information acquisition and low measurement efficiency, and has become an important research direction in the field of CNC machine tool error measurements. In this paper, according to the order of the integration of the laser single degree of freedom measurement method to the multi-degree-of-freedom simultaneous measurement system, the current laser multi-degree-of-freedom simultaneous measurement method and system are comprehensively introduced, the advantages and disadvantages are analyzed, and the future development trend of the laser multi-degree-of-freedom is discussed.