The present study attempts to investigate the intrinsic relationship between language and culture from the viewpoint of cognition. We firstly propose that culture, similar to language, exists between human and the natural world. Since the development of culture presupposes human's mental activities as well as thinking which proceed and realize themselves mostly by means of language, how would the relatedness of the two, namely culture and language, suppose to be? In the light of the findings of cognitive science and of sociolinguistics, the above question will be tackled from three perspectives, i.e. the relatedness between language and thought, between language and cognition, and that between language and extra-linguistic reality. Finally, based upon the results of the discussion, a prototype of culture-language model will be proposed.