The earliest postgraduate education in the world began at the University of Berlin. The earliest postgraduate education in the world began at the University of Berlin, Germany. Scientific and standardized postgraduate education originated in Germany, marked by the establishment of 1809 Berlin University. The principle of combining education with scientific research and academic freedom has been established, and the postgraduate training mode of tutorial system and seminar system has been implemented. The development of postgraduate education can be divided into the following four stages: the first stage,1early 9th century-187 1 year. 18 10, Humboldt, a new humanist, founded Berlin University, introduced scientific research into university education, and created a modern degree system. /kloc-In the mid-9th century, with the appearance of large-scale research institutes, a new form of apprenticeship education emerged and postgraduate education was born. The second stage, 187 1 year-before World War II, it was a stage of finalization and prosperity of postgraduate education. The unified German Empire was established in 187 1 year. During this period, the postgraduate education system was gradually established and improved, and a unique doctoral education model in Germany was basically formed. Postgraduate education is in the forefront of the world and has become a world science and education center. The third stage, 1934- 1945 Nazi dictatorship. The fourth stage is World War II, especially the period of great development and reform of postgraduate education in the Federal Republic of Germany since 1980s.