With the development of the Internet, online courses like a hurricane swept across the world, teachers consciously or unconsciously are involved in it. In order to make clear the concept and characteristic of online education, this paper, based on the readers' perspective, reviewed the development of the online courses, and summarized the author's own online course construction and application process. It also put forward the teaching staff's confusion about the online course, which will cause people to think, and finally gave some suggestions for the future development of online courses, and these will provide reference for who will construct or teaching on online courses.