This study aims to analyze the book-borrowing behaviors of users based on book-borrowing records at the John F. Kennedy Library, Office of Academic Resources. This study employed an association rule mining, a quantitative research method, to explore relationships among book-borrowing behaviors based on the records of the John F. Kennedy Library in the academic year of 2021 (from 27 June 2022 to 27 March 2023). The data were analyzed by descriptive analysis and association rules. The findings revealed that in the academic year 2021, most of the users were undergraduates (68.94%), the following were lecturers (18.76%), and the last were postgraduates (8.01%). Moreover, the most borrowed book category was General Collection (77.30%), the following was Fiction (4.64%), and the last was Old Book Collection (3.40%). Additionally, the results from the association rules that set a support threshold of 5% and minimum 50% confidence interval revealed that a relationship between undergraduates and collections of books indicated five rules, and contents of the books indicated 12 rules. Further, the relationship between lecturers and collections of the books indicated five rules, and the contents of the books showed 11 rules.