The ideal personality is an ultimate expectation of personal moral development. It stands for the perfect understanding of personal morality, indicates the orientation of moral development and affects the final tendency of social ethic. Therefore the ideal personality not only becomes the theoretical core and spiritual soul of every morals system but also is the theory focal point of moral theorist in different historical period. Actually the ideal personality is a theoretical expression of the value objective of human development and the strong belief or conviction of human's self-perfection. The huge difference about the ideal personality between Confucius and Aristotle has greatly influenced the differentia of Chinese and Western moral culture. The comparative study will elaborate their respective contents and structures, analyses differences and similarities in the two systems, and discuss the potential significances for understanding ChineseWestern cultural differences and reconstructing modern moral culture.