Over other competing discourses importance to debate on his fundamental issues. It Seems ideal position of modernity cannot reach to final conclusions about its propositions But it is a defense possibility of some kind of contrapuntal. Philosophical debate about the foundations of modernity including results that has brought the polyphonic. Different people with different views Engage in critical dialogue on the basis of this foundations and adds the interpretation above other previous interpretation about it. From this endless debate Arise Methodological perspectives lead to important results about reform of current trends. Foucault and Habermas were great thinkers of this century that their debate reflects a sound of polyphonic. Modernity is the important issues that have discuss these two together about his central themes. it seems to have conflicting views on this issue However, both sounds are considered within modernity. In fact, his views on the modernity they have given serious warnings about its future .The main purpose of the present article is examination of Habermas and Foucault debate about modernity and its three pillars, namely humanism, dialogue and democracy.