Aj. Pongrapee Kaewsaiha, lecturer in the Digital Entrepreneurship Program, SSRUIC, attended the International Academic Conference on Educational & Social Innovations (AC-ESI-2019+), held between 10 - 12 December 2019 in Prague, Czech Republic. The presentation title was LMS VS Social Network: Content Analysis with the Social Presence Theory Approach. The study aimed to explain why educators partially or completely replaced their LMS with Social Network Systems. The data was analyzed from works of literature with the Social Presence Theory approach.