This study aims to look at overall adolescents' and college students' perceptions of library and explore the sources and their related variables as well as find out related issues of perceptions of library and information use of them. The data for this study were collected through survey and analyzed descriptive statistics and correlation analysis using the data. The result shows the population users preferred search engine so much over library as their information search tool even if they trust library information sources more, also, they tend to seek information sources when it has easiness and fastness to get. Correlation analysis such as <TEX>${\chi}^2$</TEX> and Spearman were implemented and the result of the correlation shows that many factors of this study covered-such as comparison of information sources-have significant differences each other.