Abstract: The development of digital measurement and control technique in the world is reviewed, and the current status of Chinese torpedo support equipment is analyzed. The technical characteristics of the PCI extensions for Instrumentation(PXI) measurement and control system, such as higher reliability, stronge rextensibility and efficient integration, are compared with the original peripheral component interconnect(PC I). Moreover, the application of PXI measurement and control system to Chinese torpedo support equipmentis prospected in orde r to provide a reference for the further development of domestic torpedo support equipment.