Integrated library systems (ILS) supporting librarian’s work and providing user’s information retrievalefficiently are important. Especially, in the digital age, libraries face many changes, integrated librarysystems evaluation will help to improve efficiency in the development of automation systems. Theservice quality evaluation can reveal expectations, satisfaction, and perceived service quality onintegrated library systems from the perspective of the librarians. This article aims to investigate servicequality evaluation of integrated library systems at universities libraries, to explore ILS service qualitymodel, to survey librarians’ expectations, satisfaction, and perceived service quality. Research methodsused include literature review, service quality evaluation, and questionnaire survey. The ILS servicequality model is constructed using the literature review and experts interviewing, which consists offour dimensions and 34 indicators: function and modules, access and interface, service support, andsystem quality. Based on the model, questionnaires designed are sent to the librarians at the NationalChengchi University Library in 2015. This study shows that the librarians regard ILS as an importantsystem, with the overall average being 4.22 in the Likert scale, overall satisfaction average being 3.21,and perceived service quality ‐1.01. This implies that the librarians agree that the ILS is very important,but they are dissatisfied with the current ILS and its poor service quality. The system function andmodules dimension is the most important from the survey, followed by access and interface dimension.The function and modules dimension is most satisfactory, but service support dimension is the mostunsatisfactory. As a result, the study shows that the proposed service quality model of integratedlibrary systems is feasible; besides, the researchers point out ten most desirable ILS services and tenpoorest service quality of ILS services, which are valuable information for future library automation.