What is the assured meaning of the "亞" shape graphics in the Chinese primordial culture which often appears in some cultural relics such as relic bone inscription,Jinwen characters ancient graves,sundials,chessboards and so on ? Scholars have no unitive cognition on this problem in prehistoric civilzation.This treatise discusses how the ancients who lived in prehistorical culture elicited the concept of "亞" shape,and how the "亞" shape concept rose from the depiction of the shape of terra firma to a kind of psychic motif,from this discussion,the author summarized the unique universe view and ideology mode of ancient Chinese.The relation between the "亞" shape concept and the ancient proprieties system、the change of "亞" shape and the transforming of Chinese ancient society just is the concrete embodiment of the development of this universe view and ideology mode,among them contained the particular character of Chinese culture.The variations of the "亞" shape in different cultures offered us a possible clue to explore the contact among various cultures.The"亞" shape finally disappeared in eastern culture while became a kind of deiform symbol in western culture,we can generalize some differences between eastern and western cultures from this phenomenon.