The present research has been done to visual representing of knowledge and determining the vacuum and density points of scientific trends of faculty members of the state universities of IRAN in the field of Library & Information Science. Curriculum vitae of each faculty member with census method were collected and their contents analyzed. Then using a checklist, their scientific tendencies were extracted. NodeXL software was used to map out the levels. The results showed that their trends are concentrated in scientometrics, research methods in library & information science, information organization, information resources, psychology, education, management, the Web, knowledge management, academic libraries, information services, information theories and collection management. Apparently, the library & information science community of experts pays little or no attention to library & information science applications in the fields of chemistry, cartography, museum, law, art, school libraries, as well as to independent subject clusters such as minorities in library, information architecture, mentoring in library science, library automation, preservation, oral history, cybernetics, copyright, information marketing and information economy. Lack of efforts on these areas is remarkable.