Abstract: The outbreak of COVID-19 has exerted huge impact on the normal teaching of colleges and universities. Online teaching has demonstrated its unique strengths under the critical situation. The implementation of MOOC in online teaching makes it possible to realize off-campus teaching and non-stopping teaching, which is very critical in achieving the dual objective of teaching and prevention. In the practice of MOOC, teachers should make preparations well in advance, facilitate students in learning, supplement practice teaching, and conduct teaching assessment. Teachers should avoid attaching too much importance on online teaching because learning can not happen without teachers' facilitation, and teaching live alone cannot make students obtain professional knowledge without teachers' involvement.

Key words: COVID-19, online teaching, MOOC, teaching method, application