[目的/意义] 开放获取运动给古籍开发利用带来了新的机遇，古籍数字资源的开放获取将成为古籍整理工作未来的发展方向。[方法/过程] 在对开放获取大背景概述性介绍的基础上，通过案例调研对国内外古籍开放获取的研究与工作进展作了全面梳理，分别总结国内外古籍开放获取的特色，并介绍国际合作古籍开放资源建设现状。即从内容建设、规范标准、开放程度和模式3个角度进行对比评述。[结果/结论] 国内图书馆界正在快速适应全球开放合作的发展模式，但是开放获取程度仍然较低，随着数字化工作的不断推进和开放获取理念的不断深化，我国古籍数字资源开放获取相关研究将取得长足的进步。

[Purpose/significance] The Open Access movement has brought new opportunities for the development and utilization of ancient books. Open Access of digital resources of ancient books will become the future trend of development in the collection of ancient books. [Method/process] This article introduced the background of Open Access of Ancient Books (OAAB), summarized the features and research status both at home and abroad, and introduced the present situation of international cooperation. From the perspective of coverage, standard, degree and pattern of openness, we compared the status quo of OAAB across the globe. [Result/conclusion] Domestic libraries are quickly adapted to the new pattern of the global collaboration. Though still with a lower degree of Open Access, the continuous advancement in the digitization of ancient books and the ever-deepening concept of OAAB will undoubtedly lead to great progress in research and practice of OAAB in China.