中文摘要：

区域图书馆联盟作为信息资源共建共享的重要形式和图书馆事业发展的重要趋势，在国内外都已经过一定时期的研究与发展。文章简要回顾区域图书馆联盟的起源发展概况，并通过重点调查，从地域分布、类型分布、组织模式、资金来源、合作模式、管理模式、服务项目等多方面呈现我国区域图书馆联盟建设20年现状，分析存在问题，总结成功经验，预测未来趋势，为研究与实践提供参考。

英文摘要：

As an important form of the information resources sharing and the important trend of the development of the library career, the regional library alliance has been studied for a long period of time. This article briefly reviews the development situation and the origin of the regional library consortia, with special emphasis on the geographical distribution, types, distribution, organization mode, source of funds, cooperation mode, management mode, and services, analyzes the existing problems and successful experience, and discusses the future trends.