[目的/意义] 在Web2.0的大环境下，与虚拟参考咨询服务功能相似的社会化问答平台应运而生并日渐繁荣，研究其成功之处有助于图书馆虚拟参考咨询服务的可持续发展。[方法/过程] 对社会化问答平台与图书馆虚拟参考咨询的国内外研究进行文献回顾，在此基础上选取国内外具有代表性的四大SQA平台，即以百度知道和Yahoo Answers为代表的第一代网络问答平台和以知乎和Quora为代表的第二代社交问答平台为研究对象对其问答模式、信息组织模式、用户互动与管理模式进行归纳总结，再将图书馆虚拟参考网站与研究对象进行对比试验。 [结果/结论] 根据调查社会化问答平台归纳总结的特性和对比试验研究的结果对图书馆虚拟参考咨询服务提出建议。

[Purpose/significance] Under the circumstance of Web2.0, the social Q&As, possessing the similar functions of the library virtual reference services, emerge consequently and enjoy tremendous prosperity. Thus, conducting the research of its success could shed light on the sustainable development of the library’s virtual reference services. [Method/process] According to the present-day situation that Social Q&A’s prosperity challenged the library virtual reference service, a literature review of domestic and foreign relevant research was completed. On the base of this review, typical Internet Q&A websites such as Baidu Knows and Yahoo Answers, social network-oriented Q&A websites such as Zhihu and Quora, were selected as the research objects. Then, the paper analyzed the traits of four representative SQA platforms from the perspectives of the Internet interlocution mode, the information organization mode and the user interaction and management mode. In addition, an experiment between SQAs and VRS was conducted as empirical research. [Result/conclusion] Finally, on the base of the research status, the platform investigation and experimental outcomes, the improvement suggestions for library VRS are proposed.