精确测量空间自由曲面的传统方法是采用三坐标测量机的接触测量或简单的非接触测量，这些测量方法存在工作效率低、自动化程度低等缺点。在深入研究上述方法的基础上，提出了一种自由曲面的非接触自动测量方法，介绍了测量系统的构成、曲面边缘的提取、自动扫描方式的规划以及测头跟踪方式等设计要点。 The traditional method of accurately measuring the space free-form surface is to use CMM contact measurement or simple non-contact measurement. These measurement methods have the disadvantages of low work efficiency and low degree of automation. On the basis of further research on the above methods, a non-contact automatic measurement method of free-form surface is proposed. The design essentials of the measurement system, the extraction of the edge of the curved surface, the planning of the automatic scanning mode and the tracking mode are introduced.