The meaning theory of LUCLA and MOUFFE and their theory of sociology are very integrated. The sphere of society is like Sinology system in which each sign wants to find it’s meaning .To obtain this, they challenge each other .
The social sign system and it’s related concepts such as signifier and signified try to define the word in it’s specific approach. So it can identify the social subjects and social groups . to do this , it needs to divided the society into bipolar system, in other word , it make antagonistic attitude to ward society and under it’s shadow private and public life of people will be explained.
This paper aims to concentrate on two scholars thought . i.e. LUCLA and MOUFFE in this regard . it means Discourse theory toward social theory and vice versa .