The unity of knowledge and action means that the object conforms to the subject, knowledge refers to conscience, and action refers to human practice. The unity of knowing and doing is neither swallowing action with knowledge nor swallowing knowledge with action, and thinking that action is knowledge. It was put forward by Wang Shouren, a thinker in Ming Dynasty. Knowing the truth of things is inseparable from its application in reality. It refers to the propositions about epistemology and practice in China's ancient philosophy, mainly about moral cultivation and practice. Ancient philosophers in China believed that we should not only know ("know"), but also practice ("do"). Only by unifying "knowledge" and "action" can it be called "goodness". Conscience, unity of knowledge and action. It is the core of Yangming culture. Conscience first, then the unity of knowledge and action.