The purpose of this study is to discuss the modern significance of Han Won-jin's theory of nature by interpreting it from the perspective of Narvaez. Until now, Han Won-jin's theory of nature has been interpreted as meaning that the nature of humans and animals is different by contrasting with the two. This can also be said to be a meaningful work in the history of philosophy. However, there seems to be little discussion on the implications of the argument that human and animal nature are different in terms of moral education. In particular, although it is a very interesting argument to argue that human nature is not only different from animals, such as Han Won-jin, but that each person has a difference in nature, it is difficult to find a case that reveals the implications or modern significance of the word. Assuming that each person has a different nature, that is, a moral virtue, it can be assumed that each person has a different moral judgment ability or moral response ability [虛靈知覺]. From this, it is possible to explore why moral education is necessary for everyone beyond the class limits of the Joseon Dynasty along with the necessity of moral education. In addition, Narvaez's model of moral experts is a good criterion for making such an attempt. Aristotle's virtue ethics, the philosophical origin of this model, is not only consistent with the nature of Confucianism, but also the series of processes from beginners to experts is in large part consistent with the content of royal lectures and discussions based on Han Won-jin's concept of nature. In addition, this model has great implications for estimating that modern and contemporary intellectuals' struggles to protect nationality and democratic citizenship against the Japanese colonial period and military dictatorship are directly connected to Joseon Confucianism, especially Han Won-jin's theory of nature. Therefore, this study explored the moral educational meaning of Han Won-jin's theory of nature based on Narvaez's model of moral experts.