The purpose of this study is to analyze the current states and characteristics of the information poor related to library and information services in Korea. This study aims to help libraries and the related authorities understand better the information poor and develop strategies customized with the specific needs of various subgroups, by examining the definitions of major terms from laws, regulations and literatures. This study confirms that most of the information poor have more than one disadvantage, and each subgroup has its own uniqueness and diverse subgroups. It also emphasizes that libraries should take into consideration their uniqueness and multiple difficulties, and develop more user-centered library and information services in order to resolve the information gap.