Opportunity cost is an important in economics, which is the lucrative income of the abandoning option in multi - opportunity and has a wide application . From present situation of library acquisition and cataloguing this paper discusses how to remove the professionalization of acquisition and cataloguing in order to cause the benefit maximization.%机会成本是经济学中的重要概念，是人们在多个机会选择中所放弃的选项可获利的收益。作者从当前图书馆采编工作的现状出发，探讨采编工作如何“去职业化”，才能使采编工作的效益最大化。
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