The invention relates to a measuring system for measuring the three-dimensional contour of a workpiece. The measuring system comprises a workbench, a controller and a data processing and analysis system. The system also comprises a structured light measurement system, a tip and turntable system and a three-coordinate measurement system, which are arranged on the workbench. The structured light measurement system is used for measuring the complex curved surface of the workpiece in a high-speed manner; the three-coordinate measurement system is used for measuring the complex fine portion of theworkpiece to ensure obtaining of high-precision and reliable measurement data of the portion, wherein the measurement data of the three-coordinate measurement system is used for establishing a measurement reference of the workpiece; the tip and turntable system is used for clamping the workpiece and driving the workpiece to rotate to obtain measurement data of the workpiece at different angles bycombining the structured light measurement system; and finally, full-profile three-dimensional contour of the workpiece can be obtained by carrying out coordinate system unification on the measurementdata of the three-coordinate measurement system and the structured light measurement system. The measuring system integrates the advantages of high precision and reliability of the three-coordinate measurement system and high measurement speed of the structured light measurement system and the like.