According to cognitivists Lakoff and Johnson unlike the traditional views, metaphor is not limited to words and language .Metaphor, in this view, is conceptual matter that created at the level of ideas and the human mind. So, metaphor, unlike traditional definitions, is not specified for poetry and literature and literary imagination, but covers our conceptual system from the most abstract to the most tangible ones and plays the main role in defining the realities of life. This article is intended to provide a comprehensive evaluation of conceptual theory of metaphor. The most serious criticisms of this theory come from the two domains, mainly criticizing the type of data and the methodology of this theory, and secondarily criticizing the results of the data in it.