Marine research activities can be carried out offline during the epidemic. According to relevant public information, facing the huge impact of COVID-19 epidemic on offline research, maritime museum, China, under the guidance of the extracurricular association of Shanghai Education Commission, actively explored a new online research mode in the form of "real person classroom", carefully created a unique "maritime cloud classroom", and continuously played the social education function of the museum during the epidemic. With the help of online live broadcast technology, "Maritime Cloud Classroom" integrates the rich research resources of China maritime museum for many years, and