2. First of all, we must admit that university hats and gowns are closely related to the formation of the western university system. In the 1 1 century, in the extremely developed European society, most of the teachers in schools were church priests, and the robes and robes were exactly the same as priests. In practice, teachers gradually found that their social status was not stable, so they jointly established a teachers' association and implemented strict membership standards to control the quality and status of teachers. At that time, only those with excellent test scores could become new members of the guild. Those who had not completed their studies for several years were called bachelors, teachers of arts and sciences were called masters, and teachers of theology, medicine and law were called doctors. It was not until the 0/3rd century A.D./KLOC that the church issued a decree to distinguish monk's clothes from hooded robes. At the same time, the university system began to take shape. Under the triple influence of university education, secular clothing and religious clothing, a unique hooded robe appeared.