Opinions on Shao Yung and his book Huang-chi ching-shih shu are varied. Some charged him as a fortuneteller and his as a genius philosopher whose book is beyond comprehension. With regard to these comments, this essay attempts to reconsider Shao Yung's idea of nature and human to examine his life and his work. According to Huang-chi ching-shih shu, Shao Yung aimed at explaining the principles of changes in the phenomenal world by the universal point of view. However, it did strike his readers as mysterious in many ways. Since past Confucians were not keen in cosmology, Shao Yung was indebted to those mystical resources, such as the numerological speculations of Han Confucians. In theoretical level, Sao Yung had little interest in humanity; and he manipulated the legends about his foreknowledge in order to strengthen his own cosmology, He also quoted Confucius to justify himself and implied that he was the contemporary sage as well. Indeed, Shao Yung should be credited for his effort in expanding Confucian metaphysics against Buddhism. His interest would hardly conciliate with the rationalization of the Neo-Confucians, thus his philosophy was neglected.