Translation, as a special form of communication, involves the communication between the original author and the translator, and the communication between the translator and the target reader. As a bridge between the original author and the target language reader, the translator should adhere to the relevance theory as the guiding principle of translation, so that the reader can achieve the greatest contextual effect with the least effort.Grace believes that the session is subject to certain conditions. People's conversations were able to proceed because both sides abided by the principle of cooperation. In verbal communication, the speaker may deliberately violate a criterion in the principle of cooperation to convey an implicit meaning, so the listener should understand the true meaning of the speaker through reasoning, that is, the meaning of conversation.