Compared to the beginning of the century, nowadays the Internet has been widely applied in ELT in mainland China. The main advantages of using the Internet in language classrooms are the follows: it can improve students’ writing skills and reading skills, it helps students to build up vocabulary and motivate students, and it will achieve cross-cultural understanding and learner autonomy. In order to help teachers to better apply the Internet in classes, this article provides a few example lessons from the aspects of using dedicated web-sites, non-dedicated web-sites, and E-mail / WeChat. Besides, this article analyses the rationales and the techniques of the above application.