Psychology refers to the inner state of man, the process of thinking, is the subjective experience of objective things, so sometimes psychology is a psychological process, is constantly occurring, development, evolution. In the process of continuous contact with things, there will always be some psychological experience expressed, as long as people have life or to throw out the vegetative state have psychological activities, and this psychological activity, accompanied by joy, anger, sadness and happiness and other emotional experiences, reflected in the real objective world. According to its classification standard is mainly cognitive process, emotional process and volitional process, is the so-called knowledge, emotion, intention, people through cognition, emotion, volitional expression can be presented to their own internal experience process, so that the ability to form communication links between people.