Although some of the ideas of Freud have lost their leading position, and the modern advances in the field of psychology have shown some theoretical shortcomings, Freud's work is still energetic in human pursuit of self-awareness, especially in the application of clinical methods. Academically, his thoughts continue to play an irreplaceable role in influencing humanities and social sciences. In addition, he is recognized as one of the most promising man of thinking for the originality and intellectual influence in the former half of the 20th century.

2.1 The Content of Freudian Theory

Freudian psychology is primarily devoted to the study of human behavior and psychological functioning. Besides, it can also be    applied to societies. Psychoanalysis is pided into three research techniques: the treatment of psychological or spiritual illness, a method of investigation of the mind and the way one thinks and a systematized set of theories about human behavior.

In the broad framework of psychoanalysis, the basic theory of human thought and human development has at least 21 theoretical directions. So-called "psychoanalysis" refers to the various treatment methods and the term also refers to a method of studying the development of children. Freudian psychoanalysis refers to a kind of treatment. The analytic patient tells the analyst his/her thoughts, including fantasies, free associations, and dreams in his/her mind from which the analyst can analyze the unconscious conflicts leading to the formation of  the patient's character and symptoms, and then explains them to the patient and help the patient to find solutions to solve the problem. The specific content of the analyst's intervention usually involves confronting and clarifying the patient's pathological defense, desire and guilt. By analyzing the conflict, psychoanalytic treatment can clarify the patient's unconsciousness is his greatest enemy: the experience can stimulate the unconscious reactions which will cause some symptoms.

2.1.1 Consciousness and Unconsciousness Theory

Freud's fundamental idea ---- all human are endowed with unconsciousness in which potent sexual and aggressive factor drives, defenses against them, and struggles for supremacy, as it were, behind a person’s back - has struck many as a scientifically improvable and romantic notion. He argues that the sensitivity of human beings to neurobiological diseases in the catalog is almost always in the work of sexual disorder, and that pornography does not begin at puberty but in infancy. When he conducts medical research, he believes that the most complex operational thinking hides the most interesting mystery. Entity mental experience, such as physical experience, is a part of nature. This means that Freud admitted no mere accidents in mental procedures. The most nonsensical notion, the most fantastic dream, the most causal slip of the tongue, must have a meaning and can be used to unbridle the incomprehensible maneuvers we often call thinking.