This review paper focuses on teacher’s motivation in online learning during the COVID-19 pandemic. It aims to provide strategies for teachers and school leaders to promote teacher motivation. Relevant theories and previous studies were reviewed to discuss the technical, pedagogical, and psychological challenges in online learning implementation, the importance of teacher motivation, and factors influencing teacher motivation during the COVID-19 pandemic. After the review of existing research, solutions with three practical strategies were given for teachers, namely, self-regulated learning strategy, metacognitive thinking strategy, and self-care strategy. Three supports for school leaders, namely, the professional training support, autonomy support, and psychological support, were recommended to promote teacher motivation.