During the epidemic period in 2020，Shenzhen has carried out online teaching for more than three months. After returning to school，through the investigation of more than one million education administrators，principals，teachers，students and parents in Shenzhen，it is found that Shenzhen has six advantages of online teaching，such as better hardware and so on，but there are also six problems，such as students’ eye pressure. At the same time，it is necessary to think about the four main ways to develop and improve online teaching in Shenzhen in the future.