Education needs management: the traditional education mode is that teachers treat students, students aim at learning, and teachers' task is to educate people. However, the task of education is not only to teach, but also to educate people, which means that our students also need to be managed, and teachers of traditional education have both responsibilities. In this respect, online education is still out of reach at present, while traditional education is natural. Interaction of education: Education is an interactive process, not only imparting knowledge, but also requiring more interaction between teachers and students. In traditional teaching, students are subtly influenced by teachers, just like a kind of inheritance. We get knowledge from teachers, experience the truth of being a man, and feel the power that knowledge brings us. This is a quantum leap in human mind and soul. Education level: Each of us has different levels of knowledge and different needs. Although online education is very suitable for personalized learning, it has no way to judge the level of each learner, thus losing the principle that education should be individualized and individualized. On the contrary, traditional education is different. Teachers can locate the level of learners through observation, understanding, investigation and analysis, so as to determine the implementation of "teaching students in accordance with their aptitude". The development of education needs a long-term accumulation process: traditional education has experienced thousands of years of development, and its experience and theory are very mature. China's traditional culture is extensive and profound. After a long period of precipitation and inheritance, it has exerted an intangible and profound influence on students. However, online education is just a new industry. To some extent, it is imitating the traditional education mode, which only makes up for some shortcomings of traditional education and does not completely get rid of the shadow of traditional education. At the same time, online education should have its own brand-new theory, which needs time accumulation and practice training.