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Nowadays universal electronic measurement instrument can provide wider measurement range and higher accuracy, excellent function makes them been widely used, and they have integrated external program-controlled interface, so it is significantly necessary to construct the instrument-based auto-measurement system to further enhance the measurement efficiency. The E5072Avector network analyzer from Agilent is applied to measure and analyze network parameters in microwave area, it has integrated external program-controlled GPIB interface and supports SCPI commands, that means an access between physical link and program control can be established. So the E5072A auto-measurement system with LabVIEW development platform and SCPI commands has been built, this is also the valid method to set up a universal electronic measurement instrument auto-measurement system.The system has been used to measure the concentration of NaCl, the result shows that the auto-measurement system displays favorable properties like enhanced measuring efficiency, good portability and is capable for complicated measurement which is time-consuming and timing-necessary.