This article,based on the development of library and information intelligence science in the recent 100 years,analyzes the important role of two techniques"movement"in promoting the two"transformation"in the development of library and in-formation science from the perspectives of methods,bibliography movement,information retrieval language and retrieval language correlation data movement,so as to reveal that library and information science is the essence of applied science in social science field.%以近百年来图书情报工作发展历史为主线,从文献整序工作方法、西方目录学运动、情报检索语言、计算机情报检索和当代的关联数据运动及其研究深化,分析两场技术"运动"在图书情报事业发展中促进两次"转型"的重要作用,以揭示图书情报学是社会科学领域应用性学科的本质.
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