This research was a survey research which was aimed to study undergraduate students' use of social media for course-related learning at Chulalongkorn University, in terms of types of social media and information used, reasons of use, methods of use, information evaluation, forms of information utilization, and problems in using social media. Questionnaires were used to collect the data. Of the questionnaires distributed, a total of 394 were returned and usable for further analysis, so the overall response rate was 99.49% The research results are as follows: Most of the undergraduate students used media sharing, namely Youtube, for facts. Regarding their reasons of use, they used it because of its ubiquity. Moreover, most of the students used Internet search engines, specifically Google, for their method of use, considered authority for their information evaluation, and utilized the information for class presentation. Finally, the problems receiving the highest mean scores from their rating were the information was lack of authority for problems related to information; the information of search results displayed by social media was inadequate for problems related to social media; and the students had insufficient copyright knowledge to utilize the information retrieved from social media for problems related to students.