By comparing the concepts, Chinese characters, theories used by both Yiwei (a book mainly elaborating the correspondence between the seasonal points and the lines of the hexagrams in the Book of Change) and Taoism, the author points out that the cosmic outlook dwelling in Yiwei derives from that of Taoism. Moreover, the paper holds that the reason for Yiwei to accept the cosmic outlook of Taoism is that, on one hand, it resulted from the influences of the philosophical school of the Yellow Emperor and Laozi (a school belonging to Taoism) in different styles during different periods;on the other hand, it met the demands for Confucian doctrine to perfect itself. As to The Book of Change concerned, Yiwei’s cosmic outlook was affected by the learning’s tradition. Finally, the paper analyzed the merging tendency of Confucianism and Taoism in the Han Dynasty, pointing out that Yiwei adopted thought of Taoism into Confucianism played an important role for the merger for the two schools. Without the merger of the thoughts of Taoism and The Book of Change, as well as Yiwei, there would not emerge Xuanxue (a metaphysical school to integrate Taoism with Confucian doctrine) in the Wei and Jin dynasties. By comparing the concepts, Chinese characters, theories used by both Yiwei (a book mainly elaborating the correspondence between the seasonal points and the lines of the hexagrams in the Book of Change) and Taoism, the author points out that the cosmic outlook dwelling in Yiwei derives from that of Taoism. Moreover, the paper holds that the reason for Yiwei to accept the cosmic outlook of Taoism is that on one hand, it resulted from the influences of the philosophical school of the Yellow Emperor and Laozi (a school belonging to to On the other hand, it met the demands for Confucian doctrine to perfect itself. As to The Book of Change concerned, Yiwei’s cosmic outlook was affected by the learning’s tradition. Finally, the paper analyzed the merging tendency of Confucianism and Taoism in the Han Dynasty, pointing out that Yiwei adopted thought of Taoism into Confucianism played an important role for the merger for the two schools. Witho ut the merger of the thoughts of Taoism and The Book of Change, as well as Yiwei, there would not emerge Xuanxue (a metaphysical school to integrate Taoism with Confucian doctrine) in the Wei and Jin dynasties.