In the fourth year of Emperor Chengzu of Ming Dynasty (1509), Wang Shouren, a master psychologist, gave a lecture at Guiyang Institute of Civilization, and put forward the theory of "the unity of knowledge and action" for the first time. The so-called "unity of knowledge and action" and "knowledge" refer to people's moral consciousness and thought. "Doing" refers to people's moral practice and practical actions. Therefore, the relationship between knowing and doing refers to the relationship between moral consciousness and moral practice, and also includes the relationship between some thoughts and practical actions. In Wang Yangming's view, the "knowledge" in the "integration of knowledge and action" is "conscience". On the one hand, "behavior" refers to people's psychological activities, on the other hand, it is "faithful behavior", that is, the subject's practical behavior. "Knowing and doing" is an inseparable unified whole, that is, the combination of body and use of "conscience", as he said: "Knowing is the idea of doing, and doing is the kung fu of knowing; Knowing is the beginning of doing, and doing is the achievement of knowing. " [1] In this dynamic relationship, knowledge and line are interrelated and inclusive. In other words, the two fall on the famous saying and split into two; Once it reaches the mind and body, it can't be separated. [2] Specifically, Wang Shouren's thought of "unity of knowledge and action" includes the following two meanings. First, there are lines in knowledge, and there is knowledge in the line. Wang Shouren believes that knowledge and action are the same thing, and cannot be divided into two parts. He said: "knowing and doing are two words, and you get twice the result with half the effort." From the perspective of moral education, he strongly opposes the separation between knowledge and practice in moral education, and "knowing without doing" highlights the conscious action that all morality belongs to individuals. Knowledge must be manifested in action, and failure cannot be regarded as real knowledge. Wang Shouren thought: Conscience is everything, but conscious action means knowing. This is undoubtedly profound. Second, do what you know, do what you know. Wang Shouren said: "knowing is the idea of doing, and doing is the work of knowing;" Knowing is the beginning of doing, and doing is the achievement of knowing. " It means that feudal morality is the guiding ideology of human behavior, and it is time to achieve "conscience" by acting according to the requirements of feudal morality. The ideological activity under the guidance of feudal morality is the beginning of behavior, and the behavior that meets the requirements of feudal ethics is the completion of "conscience". Therefore, Wang Yangming's thought of "integration of knowledge and action" emphasizes that knowledge and action can be combined in the activities of the spiritual world [3], taking knowledge itself as a practical process and reducing the practical process to the form of knowledge. However, his view of knowing and doing is not simply about the relationship between knowing and doing, theory and practice, but about the relationship between knowing and doing at the moral level. People's moral understanding and moral practice were realized by Wang Yangming after experiencing the hardships in the big environment at that time and realizing the vicissitudes of contemporary human life. His purpose was to solve the problem of social moral decay at that time, so as to call back people's initial heart, that is, "conscience." The way to restore people's conscience is "to conscience", so "unity of knowledge and action" is essentially "to conscience". In a word, "conscience" is Wang Yangming's world outlook, and "to conscience" is his methodology.