Social Network Service (SNS) such as Twitter, Facebook, Instagram, Kakao Story, and Naver Band is one of the representative social media. SNS makes the use of netlanguage more diverse and active. In this study, we examine the concepts and domains of social media that provide various environments for the use of texts, and examine existing research on internet text, netlanguage, and social media from a textlinguistic perspectives. We will also present the subjects and prospects for the activation of textlinguistic research related with social media. The task of textlinguistic study in the SNS ages is as follows. First, basically, there is the need of more efforts for textlinguistic attention to the internet text and netlanguage. Second, we need to expand the study of textlinguistics through the discovery of new internet texts. Third, there is a need for interest and full-scale research on multimodal texts in internet. Fourth, there is a need for interest and real research on the big data of the internet. Fifth, the study on the social meaning of texts can broaden the boundary of textlinguistics.