Based on current test system theory and the virtual instrument technology research in this paper, establishing a detecting system as the PXI core based on the comprehensive testing system for LabVIEW8.5. Based on LabVIEW for the software platform in this system, with graphical program language designed for electronic equipment system detecting modules and the source program flowchart. This detecting system can reduce maintenance cycle effectively, reduce maintenance costs and improve reliability, system maintenance level of electronic equipment to achieve digital, modularization and intelligent .