Answers on social Q&A platforms show differences between quality performance perception and importance expectation perception. According to the method of IPA (Importance Performance Analysis), the differences can be di-vided into four regions:“Continue to Maintain”region,“Key to Improve”region,“No Need for Priory”region and “Over Expression”region. Based on pilot studies, this paper uses customer satisfaction model theory to structure the conceptual model of customer satisfaction to the quality of answers on social Q&A platforms with indexes of the“Key to Improve”region, and then corrects and tests it through user surveys. This paper finds that users expectation perception quality, performance perception quality and perception value have direct and great influences on users general satisfaction de-grees, which has a strong positive correlation influences on users continuance. This paper also finds that improving the four quality indexes of “Key to Improve”region can effectively enhance users ’ satisfaction and the willingness to use social Q&A platforms continuously. This paper also gives suggestions on bettering the quality of answers on social Q&A platforms.%社会问答平台答案质量绩效感知与重要性期望感知的差异性，运用重要性—绩效性分析(Importance Perfor-mance Analysis，IPA)方法可以分为四个象限，即“继续保持”区域、“重点改善”区域、“毋需优先”区域和“过度表现”区域。文章运用顾客满意度模型理论，构建基于“重点改善”区域相关指标的用户答案质量满意度概念模型，并通过调研来修正和检验概念模型。通过研究发现，用户的期望感知质量、绩效感知质量和感知价值，对用户的总体满意度产生直接显著的影响，并且总体满意度对用户的持续使用产生强正相关影响，表明提高“重点改善”区域质量的相关指标能够有效地增加用户的满意度，增强用户持续使用社会问答平台资源的意愿，并为社会问答平台答案质量的提升提供相关建议。
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