以任务分析为导向,对关于网站可用性理论进行阐述。并以MUG模型作为评价基础,得出高校图书馆网站的可用性评价体系的概念模型。以西南科技大学图书馆网站为例,采用标准的可用性测试方案“CIF标准”展开可用性测试实验。通过研究分析,得出图书馆网站在内容、交互,视觉三个方面存在着一定程度的问题,最后对如何提高图书馆网站可用性提出建议。 Guided by task analysis, this paper elaborates on the theory of website usability. Based on the MUG model, a conceptual model of the usability evaluation system of university library websites is obtained. Taking Southwest University of Science and Technology Library website as an example, usability testing program “CIF standard” is used to test the usability. Through research and analysis, it is concluded that the library website has some problems in content, interaction and vision. Finally, some suggestions on how to improve the availability of the library website are provided.