[目的/意义] 图书馆开展线上图书漂流服务可以打破传统服务局限，激活社会上的海量闲置图书资源，解决国内现有图书漂流活动或平台存在的诸多问题。[方法/过程] 对济南市图书馆主导搭建的"书来书往"线上图书漂流平台的产生背景、主体及母平台、功能、使用方法、规则、运行情况、资金支持情况、获奖情况、用户评价等进行详细介绍，分析该平台相对于国内现有图书漂流活动或平台的优势及目前平台存在的问题。[结果/结论] 图书馆开展线上图书漂流服务应在借鉴"书来书往"平台经验的基础上做好以下几点：实现多入口操作、重视图书可追溯性、提升社交服务、打造全国性品牌。

[Purpose/significance] The library's online book rafting services can not only break various limitations comparing to traditional services, but use the idle book resources in the society properly, and also be able to solve many problems existing in domestic book rafting activities or platforms.[Method/process] This paper introduced the "book to book" online book rafting platform led by the Jinan Library in detail as follows: background, main body and parent platform, functions, usage methods, rules, operation, funding support, awards, user evaluation, etc. At the same time, it analyzed the advantages of the platform compared to existing book rafting activities or platforms in China, and shortcomings of the platform.[Result/conclusion] On the basis of learning from the experience of "Book to Book" platform, the following points should be done well in carrying out online book drifting service in library: achieving multi-entrance operations,attaching importance to book traceability,improving social services,building a national brand. But it should be optimized and improved in the following aspects: achieving multi entry operation, enhancing book traceability, promoting social services, expanding service scope, etc.