My thesis study Xun-zi's philosophy of rites, who be the master of Confucian classics studies according to the 'Ritual Doctrine'(〈禮論〉). The question of rites of the 'Ritual Doctrine' is how to solve the conflict of desire, which causing by human nature; and the answer of Xun-zi is rites or Li-yi(禮義). The mean of rites of the 'Ritual Doctrine' has four aspect, recognize morality and knowing obligation by rites first, which about the construction of ethical value. Secondary, the origins of rites is the universe, ancestors and the teacher who govern the people; and the meaning of origins of rites is objective and universal. Third, the functions of rites is making human nature cultured and making moral norm. Fourth, the meaning of funerary rite is representing the cultured emotion, which express the sad feeling and the respect to the dead; and this is the coherence of the living people and the dead. I discuss the thinking of Li-yi to ritual morality further. The ritual morality is to knowing moral and ethical value which called the Fen(分)first. Secondary, the theory of ritual morality is came from ancient Sage who keeping moral imperatives, which called the ritual integrity(禮義之統)for practical principle. According to the thinking of 'Ritual Doctrine' and ritual morality, I induct Xun-zi's philosophy of rites for five points: the ritual morality is the intension of rites, the combination of objectivity and morality, natural emotion could be cultured by rites, the value of ritual functions is objective beings, the rites have concrete practice which about life, personality, education and politics. My thesis concludes that Xun-zi's philosophy of rites including the meaning of rites, moral norm of rites and philosophical meaning of rites.