It is common to analyse literature works with the help of linguistic knowledge. The abidance and violation of the Cooperative Principle (CP) in some novels may have the an unexpected literary works. In spite of tremendous researches on The Little Prince, there are few studies analyzing the dialogues between characters in literary works from the perspective of the violation of CP. This article tries to analyz the conversations in The Little Prince, based on Grice’s Cooperative principle. The aim of this article is to reveal the the features of the main characters and the deep meaning behind the literal words. Through the analysis of the violation of CP in the communications, readers can have a better understanding of the essence of The Little Prince. Meanwhile this study shows that in the process of appreciating literary works, it is possible to understand the text better, with the help of linguistic knowledge.