Abstract: Using mapping of science and information visualization, 69 most cited papers in the international journals of scientometrics during 1978-2004 are analyzed. The document co-citation map identifies seven core research fronts: citation theory, science communication, basic research assessment; mapping of science, webometrics; collaboration in science and technology; scientometric distribution, bibliometric law, informetrics; scientific indicator and evaluation of national research performance; new production of knowledge-dynamics of science and technology; linkage between science and technology.