A monitoring system for specialpurpose CNC machine was designed based on LabVIEW and details of the overall design and hardware configuration of monitoring system were introduced,as well as the key technologies to achieving functional modules．The structure of this monitoring platform was the upperlower system,regarding the IPC which LabVIEW software was installed on as the upper system,the HNC808M NC device for machine tool processing control and the PLC device for data acquisition as the lower system.Experimental results show that the system is stable and reliable and able to realize data communication and realtime monitoring of the installation,debugging,operation．