Compared with live courses, online courses are more flexible and convenient without time and space restrictions. Online courses can be studied repeatedly. Live courses can only be listened to once in class, and the rest of the time will have to be reviewed by notes and books. Online courses have higher requirements for students, not only to be able to learn actively, but also to have a good ability to restrain. According to the learning plan, you can control the learning time and progress yourself and the live courses are managed by teachers. Online courses cannot be solved immediately after encountering problems, and the lag of network interaction will waste some time.There is no learning atmosphere in online courses, no classmates are faster than learners, and learning pressure and motivation are insufficient, which will increase the total time.