Psychoanalytic therapy was founded by Austrian psychiatrist and psychologist Sigmund Freud, the basic ideas and contents of psychoanalysis are as follows: (1) free association. The patient is asked to associate freely and without fear, and to bring out any event that comes to his mind, including the past of his childhood. Of course, these events also include his own dreams. The psychiatrist analyzes the patient’s true inner activity and motivation from what he associates. When the patient cannot make random associations very smoothly, i.e. something is in his subconscious and he cannot associate it for a while, then the psychologist can use hypnosis to make the patient associate various things that are repressed under the hypnotic state. (2) Dream analysis. When analyzing the treatment of patients, Fourier likes to let patients tell their dreams. He believes that dreams have a close connection with the subconscious, and through dream analysis, a path to the subconscious can be opened, which is important for healing patients. Faust believed that dreams were a kind of wish fulfillment. He says: “A dream is a chilling mental activity; it is always motivated by the desire to be fulfilled. The dream as an impossible desire to be identified is caused by the effect of the mental checks to which it is subjected during its formation.” (3) Interpretation. After learning about the patient’s subconscious, mental repression, and motivation through free association and dream analysis, it is necessary to explain those subconscious meanings of them to the patient. In this interpretation, the patient is freed from psychopathology and psychological conflicts, which leads to the resolution of the patient’s psychological problems. The psychoanalytic approach has been controversial in the psychiatric community, and because of its long treatment time and high cost, psychologists generally do not prefer this approach in treating psychiatric patients. However, F. Hoffmann’s psychoanalytic ideas have had a profound influence on psychiatry and psychology, especially his theory of the subconscious mind, which is often an effective weapon for psychiatrists in treating patients with mental illness and psychosis. Moreover, many psychotherapeutic methods were invented under the influence of Faust’s ideas.