The purpose of the university library’s reading room is to provide a space for reading books. However, with the recent increase in use as a personal learning space, discussions have been made on spaces in university libraries. The ultimate goal of this study is to analyze the utilization status of reading rooms in university libraries that exist to support students’ learning activities, and then to derive preference factors according to spatial characteristics of each room. For this purpose, we selected “J” University as a research target. The log data was collected and analyzed for one year from various reading rooms in “J” University. Based on 218,939 cases generated from 40,753 users, usage patterns were analyzed according to period and space. Through the analysis results, preference factors for reading room were derived. In addition, the considerations for improving space utilization were proposed. The results of the study can be used in the future to improve space arrangement and space utilization in reading rooms of university libraries.