The study systematically reviews the studies based on a search of published articles from 2010 to 2021 on library service quality with the aim of determining which models of service quality are the most commonly used by librarians as a means of measuring service quality. In addition, the paper makes an effort to determine the variety of dimensions by which these qualitative evaluations were carried out, the types of libraries that have reported such qualitative studies, and the data collection strategies (research population, sample size and data collection instruments) adopted by the authors. The findings indicate that the SERVQUAL and LibQual models are the most frequently adopted models. The empathy, reliability, tangible, assurance, responsiveness, effect of library, information control and library as place are the prominent dimensions. The researchers rely heavily on questionnaire-based survey research methods with sample sizes of less than 100 respondents, mostly reported in academic libraries.