عنوان مقاله [English]
As long as technological development and Varity of inventions during the 20th century in scientific environment, literature and criticism were enhanced and developed. The upsurge of current literary theory has become something of significant phenomenon in contemporary literature, emerging as formidable force in interdisciplinary subjects. “Literary theory” is the body of ideas and methods we use in the practical reading of literature. By literary theory we refer not to the meaning of a work of literature but to the theories that reveal what literature can mean. Literary theory is a description of the underlying principles, one might say the tools, by which we attempt to understand literature. All literary interpretation draws on a basis in theory but can serve as a justification for very different kinds of critical activity. The theory of literature has been changed during 20th century and was presented new criteria. Such criteria have been changed constantly and very quickly. This study tries to examine and criticize such theories how much are permanent or temporary. There has been an essential question whether critic literature theories are able to present themselves in logic structure? Therefore this paper has applied three literature theories such as formalism, constructivism, and post constructivism as well as use descriptive and analytic approach as mythology.