The first stage: the embryonic stage of the discipline.
The main feature is that pedagogy has not differentiated from philosophy, politics and ethics to become an independent discipline.
The second stage: the initial formation stage of the discipline.
The main feature is that pedagogy has become an independent discipline in its primitive state.
The third stage: the stage of discipline development.
Pedagogy is developing in the direction of science as a whole and locally.
The fourth stage: the stage of discipline modernization.
With the progress of society, the modernization of production, and the modernization of science and technology, pedagogy is urged to develop in the direction of modernization.