The purpose of this paper is to make a careful study on the characterization of information science and to describe the scientific basis for the revitalization. At first, various theoretic models in initial stage and later tendency of infor mation science are analyzed and evaluated. After that the dilemma and nature of information science as a postmodem science are investigated. Upon the results of these analysis and investigation, the new reference points of information science are presented from the strategic, theory-immanant, and methodological aspects.