This paper analyses the study of language based on two aspects: structure and meaning.The paper first gives definition of language.Secondly,the paper summarizes the basic contents of phonology,morphology,syntax,semantics,and pragmatics.Then it focuses on the cooperative principle and the reasons why people violate the maxims and the functions of conversational implicature. This paper analyzes the study of language based on two aspects: structure and meaning. The paper first gives definition of language. Secondarily, the paper summarizes the basic contents of phonology, morphology, syntax, semantics, and pragmatics. It it focuses on the cooperative principle and the reasons why people violate the maxims and the functions of conversational implicature.