Abstract: The previous extension generating system software can only be used to solve some kind of contradiction problems. Through the analysis of the existing problem modeling methods and their shortcomings, it presents a new modeling method, based on the idea of classification. A detailed description of the problem classification modeling steps was given, and finally implemented in programming. Experimental results show that the new modeling method can be used to classify different kinds of contradiction problems in some areas. As a result, it not only creates a universal input interface to the extension strategy generating system, but also has great practical significance for the versatility of research on the Extension Strategy Generating System.

Key words: Extension Strategy Generating System（ESGS）; contradiction problem; classification; modeling