Abstract: Here discussed is a method of constructing a hypertext based ICAI system according to the cognitive processing model. In order to be organized more flexibly, the learning material is divided into three levels （entity level, concept level, and unit level） and there are three links at the concept level （control links, browse links, and fixed links）. Moreover, expected value is defined to represent the important degree of the learning material, and then the system can automatically determine the learning emphasis and adjust its pedagogical parameters to satisfy different students.