Today there is no testing instruments for compress natural gas(CNG) station in our country, so a testing system for CNG regulator station was designed. Based on LabWindows/CVI software from Natural Instrument(NI) Company and virtual instrument technology, the system provides a scientific basis for novel designing and improving for regulators and monitoring devices as result of realizing many real-time detection and control of operating parameters for the regulator. Experimental results show that the system has some good features, such as convenient detection, reliable operation and user-friendliness, which can perfectly meet testing requirements of characteristic parameters of the CNG regulator station.