Abstract: The SAS software which is the standard software in statistics analysis field is used. From the methods selection of Instrument Analysis and Chemometrics to SAS software using, a Data Processing System applied in multicomponent's simultaneous-analysis is developed successfully and a set of fast, accurate analysis method has been set up. Five mixed Nitrobenezenes is determined as an example and the result is satisfying. It is a fine combination of mathematics, chemistry and computer technology and the analysis efficiency is improved greatly.