The utility model belongs to the technical field of the design and application of new energy grid-connection detection systems, especially relates to a wind turbine generator system grid-connection performance testing system based on an industrial personal computer. The wind turbine generator system grid-connection performance testing system of the utility model includes external environment measurement auxiliary equipment, the industrial personal computer and a data acquisition device; data output port output lines of the external environment measurement auxiliary equipment are connected with data input ports of the data acquisition device; and an output port of the data acquisition device is connected with a data conversion interface of the industrial personal computer. The wind turbine generator system grid-connection performance testing system of the utility model has the advantages of simple operation, convenience and flexibility, strong processing ability, graphical output, low cost, practicality and economical efficiency and the like. With the wind turbine generator system grid-connection performance testing system based on the industrial personal computer adopted, measurement and control of a wind power generation field can be simplified; amount of investment can be decreased; measurement cycle can be shortened; and the controllability and the convenience of the testing system can be improved.