The paper collects and summarizes the protocol analysis method used currently, and introduces a new suite of analyzing techniques which are  divided into 4 levels and 12 sorts. We can assort the application data including the unrecognizable data running on the Internet into different kinds of protocols efficiently and precisely using these techniques. For those encrypted or masked packets, the techniques may finish the analysis task without decryption or any other complicated calculation. Once they have been classified as protocols, network traffic control could be done easily.