In this article, dimension-reduct ion opt imizat ion treatment has been made to account ing and monitoring model on regional scient if ic and technolog y progress by using the mu-l t iple-element account ing and analysis method and establishing the criteria for opt imization. T ests show that the new parameter system af ter dimension reduct ion can w ell subst itute the original parameter system, thus providing a method to opt imize models consisting of large number of parameters, w hich are frequent ly encountered in comprehensive ev aluat ion. This method can help to make the modeling for comprehensive evaluation more scient ific and simple, and a-l so increase its operability in practical applicat ion.