This study has been conducted in preparation for a library instruction program for the Sangmyung University Library. The purpose of this study is to assess the effectiveness of different types of library instruction in improving the information literacy of users. 112 questionnaires were measured and analyzed using SAS and t-test, ANOVA among other statistical techniques. The results were as follows: (1) Library instruction directly affects the information literacy of users. After taking library instruction, users were able to effectively use the AtoZ service, related Sites service, thesis service, E-resources, DDS service, off-campus service, translation system and the e-book service through the library homepage. (2) Group instruction proved to be the most effective type of library instruction while online instruction was the worst.