Expansion: the main signs of the establishment of independent pedagogy are: first, education has become a special research field; Secondly, it has formed a special system of educational concepts and categories, concepts and categories that reflect the essence and laws of education; Third, there are scientific research methods;
Fourthly, some important educators and some specialized and systematic educational works have appeared. Fifth, specialized educational research institutions have emerged. These signs did not appear at the same time, but gradually formed in a relatively long historical period. Therefore, the historical process of the establishment of pedagogy has also gone through more than 200 years.