Teachers' professional development requires teachers not only to have profound academic foundation, broad academic horizons and awareness of pursuing academic frontiers, but also to understand the laws of teenagers' physical and mental development, what to teach and how to teach, master modern educational technology, and at the same time have the qualities of loving, caring and being responsible for students, so as to become mentors to develop students' wisdom, tap their potential, stimulate their creativity and cultivate their sound personality. Teachers' professional development requires teachers to have the ability of lifelong learning, and constantly update their knowledge through various forms of continuing education according to the development of society, economy, science and technology and education.