中文摘要：

社会网络环境下，用户的参与意识越来越强，推动问答服务平台与社交网络的结合,进一步发挥群体智慧,从而实现问答服务向社交问答服务的转型发展。文章分析问答服务与社交问答服务的不同，探讨社交问答服务的兴起原因，比较第一代问答平台与第二代问答平台以及典型第二代问答平台间的不同，认为社交问答服务应在质量控制、用户体验和激励机制等方面进一步优化。

英文摘要：

In the social network environment, the user＇s participation consciousness becomes stronger and stronger, which promotes the combination of Q＆A service platform and social networks for making use of group wisdom, thus fulfils the transformation from the Q＆A service to the social Q＆A service. This paper analyzes the difference between the two Q＆A services, studies the reason for the rise of social Q＆A, compares the inquiry platform of first generation with that of second generation, and makes suggestions that social Q＆A service should be optimized in terms of quality control, user experience and incentive mechanism.