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The control valve is very important in the field of industrial control. however the research on the control valve performance testing and evaluation system is very weak at present. It is very difficult to measure the performance of the control valve accurately by conventional instruments. In view of this situation, this paper has developed a control valve performance test and evaluation system based on NI CompactRIO hardware, various sensors and LabVIEW software, the system can test and evaluate the function of control valves on-line, and can collect the results of the performance evaluation of the control valve in a real-time display similar to the medical report, providing a reference to the valve manufacturer's factory testing, maintenance testing and routine maintenance. Using this system, the performance test and evaluation of a company's direct air open film regulator S9044 were carried out. Experimental results show that the system can fully and accurately test the performance indicators of the control valve, at the same time, the system has a good interactive interface, strong expansibility, and high precision.