Pasteur founded bacteriology, Fauchner founded psychology and Mendel founded modern genetics. These epoch-making scientific achievements had a great influence on Freud. The mysterious attraction of human thoughts and the whole human body urges medical students to study harder. In addition to the required professional courses, he also has to listen to courses such as philosophy, zoology, anatomy and physiology. It is said that he hardly wasted a day in college, so he became the official assistant of Professor Bumuk of Physiology with his real talent before he graduated, and completed several difficult scientific research projects under the guidance of his teacher, which made him emerge in the Austrian scientific community. 188 1 year, successfully obtained the medical doctorate. The following year, he became a clinical intern in Vienna Hospital. Soon, under the enthusiastic recommendation of Professor Brooke, he got a scholarship to study in France. He began to study mental illness and hypnosis in France, and came to the conclusion that if hypnosis can lead to insanity, then insanity may be caused by self-suggestion, because hypnosis makes patients respond to things they didn't realize before.