Library and information science(LIS) research, as reflected in its own disciplinary and professional history, has been ignorant of the transitions and developments of other humanities and social science disciplines. For instance, the positivistic perspectives in research have been maintained in the field while other disciplines have been experimenting wide variety of research methods and aspects. This paper attempts to articulate that LIS research should play an appropriate role in analyzing and investigating various key-words in modern knowledge society. In this regard it scrutinizes the applicability and implications of discourse analysis. It specifically surveys the historical background of the development of LIS research; then it explains the dimensions of discourse analysis and some principles; and, finally it shows some examples of research projects that emp1oy these perspectives.