Online school is a complete process of realizing off-campus teaching through the internet; As long as you can surf the Internet, you can surf the Internet anytime and anywhere and choose your own learning content. Compared with face-to-face education, online education has broken through the time and space limitation of education to the greatest extent. It is a teaching activity that separates teachers from students, not organized face to face. It is a cross-school and cross-regional education system and teaching model.