The purpose of this study is to track the eye movements of the viewers who see the artworks by eye-tracking, explores the effect of the difference in prior knowledge level on artworks on the specific and diversive appreciation activities of viewers. Participants were 5 university students majoring in art education and 5 university students majoring in other education. A total of 10 students participated in the study. The study period lasted from June to October 2019. The research method was used both by quantitative research, which is an eye-tracking activity using eye-tracking technology, and qualitative research method through diagnostic evaluation and post-interview to identify the characteristics of the participants. The results of this study were as follows: First, when the viewers had a high level of prior knowledge, they showed intensive gaze in a certain area when admiring the work, and tended to look at the work through specific exploration. Second, when the viewers level of prior knowledge was medium, specific exploration and diversive exploration took place at the same time. This depends on the level of prior knowledge and the degree of prior information on the work. Third, when the level of prior knowledge of the viewers was low, the distribution of gaze of the gaze was evenly found in the whole area, not in the specific area, which means that the diversive exploration appeared intensively during the viewing of the work. This study found that the gaze movements of viewers who appreciate works of art differ according to the level of prior knowledge. It is expected that the study of the vision and the movement of the viewer s gaze will provide visual clues to the art teachers who teach students in the field of education.