As the cores of education, teachers’ emotions have a critical place in academia. However, the power of EFL teachers’ positive emotions and their regulation in online mode of instruction have been ignored by scholars. With the rapid shift of education from face-to-face to remote/electronic delivery, many challenges and emotional problems emerged among teachers and learners worldwide. This entailed the necessity of considering and planning for emotional regulation to generate positive outcomes. To provide a roadmap for this line of research, the present mini-review article presented the theoretical and empirical underpinnings of emotion regulation, its origins and definitions, as well as outcomes for second/foreign language education. The study also presents some implications for EFL teachers, teacher trainers, and avid scholars of this area of research pinpointing the current yawning gaps.