The invention relates to a method and a system for testing the performance of steam media. The method for testing performance of stream media comprises the following steps of: providing the relative information containing files to a terminal by a server; and when the terminal orders and plays the file, determining the performance parameters of the stream media system according to the result of the file treated by the terminal. The system for testing performance of steam media comprises the server and the terminal, wherein the server is used for providing the relative information containing the files, and the terminal is used for determining the performance parameters of the stream media system according to the treatment result of the file when ordering and playing the file. The method and the system for testing the performance of stream media can test the performance of the whole stream media system in the mobile network environment, and can not only test the performance of the stream media server, but also test the performance of the terminal and the interactive performance of the terminal and the stream media server. The invention provides a plurality of user models, so that the performance test of the stream media is more common.