Background: During the COVID-19 pandemic, online education has become popular. However, it was worth probing into how to ensure the quality of online teaching due to the change of learning environment and the barrier of space distance. Zimmerman’s self-regulated learning theory argued that the students' self-regulated learning was the interaction between and among ego, behavior and environment, and self-regulated learners could not only a learning process for the inner active control and adjustment, but also through external feedback to the external form of learning and learning environment to take the initiative to monitor and adjust. This study aimed to explore...