In order to study the key technical links such as the installation and wiring of the probe system,debugging and macro program call in the on-line process of applying Renishaws precision trigger probe on the FANUC machine tool,the structure composition and assembly method of the probe and signal receiver and the line connection with the machine tool,parameter setting and data communication debugging methods were explained.The visual diagnosis process of LED signal lights corresponding to different working modes of the probe was analyzed.By using a macro program with detection function,the specific geometric characteristics of the product were detected.The results show that the probe system can be used to successfully implement the on-line measurement function and timely alarm and feedback for the out-of-tolerance data,and improve the application ability of intelligent online detection precision equipment.