The purpose of this study is to analyze the effects of English learning through social media on the perception and affective factors of college students. To this end, researchers examined whether the educational use of YouTube and KakaoTalk, popular among college students in Korea, differs according to English improvement, affective factors, and English level. The subjects of this study were 63 freshmen majoring in Medical Convergence, who were taking college English at C University located in Gangwon-do. An online questionnaire was used for data collection. The collected data were analyzed using Jamovi, a statistical program. The results are as follows. First, the participants positively changed the perception that the use of social media had on the overall improvement of English. Second, the affective domains such as self-confidence, attitudes, values, beliefs, and interests of the participants also changed positively. Finally, it was confirmed that social media has educational value regardless of English level.