[目的/意义] 循证采购模式以用户为导向、以数据为基础，辅以图书馆的专业分析，有利于图书馆馆藏的优化发展，因此对图书馆循证采购模式的实践研究具有重要的参考意义。[方法/过程] 介绍美国两个图书馆联盟电子图书和多媒体资源的循证采购实践情况，包括操作方式、操作流程和实践结果，并对项目的共性问题进行分析。[结果/结论] 图书馆开展循证采购模式需做好数据准备工作、适当的宣传推广、选择适合的资源供应商、提出准确完善的使用量统计需求，并结合多重证据进行决策。同时提出我国图书馆的EBA模式发展思路。
[Purpose/significance] The evidence-based acquisition mode is user-oriented and based on the data and the professional analysis of the library, so as to realize the optimal choice of resources, and can better promote the development of library collections. Therefore, it is of great reference and guiding significance to understand and study the practice experience of evidence-based acquisition mode.[Method/process] This paper introduces the use of evidence-based acquisition model by two library alliances in the United States to purchase electronic books and video resources on the group level, including operational methods, process and results, and also analyzes the common problems of the project.[Result/conclusion] Library evidence-based acquisition program need to make data ready for work, have the appropriate propaganda promotion, choose a suitable resource supplier, come up with accurate usage statistics requirements, and combine multiple evidences to make decisions. It also puts forward the development idea of EBA model in Chinese library.
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