| This text focuses on the theoretical research and analyses of the technology of the search engine , including the following contents mainly: the developing history and current situation of the search engine, the principle of spider in it, tactics of collecting information, the analyses about how information is drawn in the search engine, information excavating, intellectual agent, etc. Having analyzed its realization mechanism, the principle of searching , algorithms of analyzing in the theme correlated degree, and participle technology applied, a search engine based on content has been developed, and applied to the science and technology network of Chinese Tobacco. The system uses C language to develop, and adopts SQL SERVER to set up the index database, and has achieved better application result in the real work, it also has application study value and meaning to reduce repeated labor intensity and raise working efficiency and quality. |