With the implementation of electric power market, it is a difficult problem to provide the high quality and safety electric power, so, the electric power quality test is a key to solve it. Now, many electric power test system is designed by traditional single chip microprocessor with many disadvantages, we present a kind of method to realize based on virtual instrument (VI). System mainly designs upper PC management and test homepage index sub-system made by LabVIEW platform of VI software in this paper, aiming at disadvantage of existing test system without needed authority login module and management man-machine panel. This paper introduces part of system design method and practical result in detail. This system has stronger transplantation to other system because of modular design, which has broad practicality and application prospect.