Investigating the correlation of eye-shift of a spectator looking at artwork and the process of his/her obtaining a breakdown in appreciating, we analyze the human's cognitive process for artwork under experiments and questionnaires. The eye-shift and protocols of the communication of the subjects with interviewers show that several aspects reflect their level of appreciation experience. These as pects include the scope of extensiveness in fixation points, the number of fixation points, and the variety of words in description of appreciating. Paintings as artwork are defined a global matter which are integrated by a balance of local pieces. Eyes explore information in the local pieces, and select the intentions for knowing the global structure of the work. This visual information can create a meaning of the work combined with another sensing information and prior knowledge and experiences. Thorough a breakdown for the meaning and a creation of the scenario, the exploring integration are converged to an order, i.e. an interpretation of the work. Advancing the appreciating experience, the exploring radiates more extensively to obtain many local pieces. This activity makes effectively to integrate external information in circumstances and internal knowledge of humans. The eye-shift in the describing the impression of the work shows that communication and externalization of words accelerate the exploring, and it helps to obtain new breakdowns and understandings to the work.