Introduction to pedagogy synthesizes the style of previous textbooks and absorbs new materials of educational science research. Combined with educational practice, this paper sums up the common problems in the principles of pedagogy and divides them into twelve topics for discussion. The content of the textbook is concise, comprehensive, rich and representative. Because this textbook emphasizes the fundamentality and practicability of educational theory, it has the characteristics of an outline, so it is suitable not only for college students, but also for students in correspondence education, adult education and self-study exams.