Using SCI as the data source, the international articles on the nanotechnology from the database of SCI are searched. Based on pajek software technology, the science collaboration network of the world nanotechnology in 15 years from 1990 to 2004 is analyzed. The network characters from three facets: scientist, country, and subject are specially explored. The relative characters of science collaboration cluster and result production are shown. . 9 Refs In Chinese