A Study on the relevance with text comprehension and semantic structure is to explain how a man understands the world-building situated meaning and communicates the external world through the real text. The concept of critical reading is reader' energic reconstructive processing in finding of Text-eaning. This paper explains to approach to the text comprehension with two dimensions. In first level, text structure is analyzed into micro structure, macro structure, superstructure, and text content is explained by description of relations of each structure. In second level, whole and further meaning of text is constructed by inferring sociocultural context, which has been theorized by transition of interpretation in literature and semiotics. Text first-level meaning interpreted in first level is superficial and locutionary, but second-level meaning in second level is further, situated, ilocutionary and often perlocutionary. Especially, Critical reader reconstructs semantic world by inferring situated meaning and by grasping writer' internal intentions, text-purpose, sociocultural backgrounds of text production, and so forth. Cognition in text comprehension is divided two worlds : internal text-world, external text-world. Internal text-world is reader' semantic representation of text contents and text structure, and external text-world is nonlinguistic representation which has intertextuality against origianl text and is consisted of values, beliefs, knowledges, backgrounds, schema, and etc. reader synthesizes 'internal text-world' and 'external text-world' uring critical reading. Accordingly, critical reading is interpretation-processes of sociocultural, situated meanings and an evaluative and creative activity assuming critical thinking in constructing of text-eaning.