Aiming at the problem that the measurement system of the articulated arm measuring machine cannot complete complex functions such as trajectory planning and error compensation, a measurement system for the articulated arm coordinate measuring machine based on the Unity platform was developed. The functional requirements of the articulated arm measuring machine were analyzed and the corresponding algorithm model was established. The measurement system of the measuring machine was built on the Unity platform. For the measurement system, the virtual prototype display function, the synchronous movement function of the virtual machine and the actual prototype, the multi-joint synchronous trajectory planning function and the error compensation function were respectively designed. The measurement system was used to complete the measurement experiment of the standard ball diameter. The results show that the average error after compensation is 0.015 5 mm. The integration of the measurement system functions of the articulated arm measuring machine was completed, laying the foundation for the realization of the automatic measurement of the measuring machine.