The present study investigated the effect of technology-task fit on the perceived performance of users of public libraries in Khuzestan given the mediating role of perceived ease. The statistical population of this study included all users of public libraries in Khuzestan. Among them, 410 employees were selected using a convenience sampling method. The study variables were collected using the questionnaire designed for this study and analyzed using the structural equations approach and path analysis in SPSS and LISREL software. In this regard, 204 questionnaires were distributed among the users of the public libraries' information system of Khuzestan. The results revealed that technology-task fit affects the perceived performance and perceived ease of users of public libraries in Khuzestan in using information technology. The effect of perceived ease on perceived performance given the mediating role of perceived ease was rejected.