With the popularity of emerging intelligent tutoring system, combined computer assisted instruction with artificial intelligence, the artificial researches and designs webbased intelligent tutoring system, especially makes an analysis on the structural composition and key technology. Based on the intelligent technology, there are five models in the intelligent tutoring system. They are cognition student model, knowledge representation model, intelligence frame tutoring model and learning guidance reasoning model. By the five models, it can be a more intelligent college tutoring system. It not only can improve the efficiency, but also can build an intelligent management on tutoring and learning. Then it can bring much convenience for tutoring and has much practical significance.