“LIBERTY” and “fatherland” are regarded as the main conceptions of Mashrooteh poem. Malek. ol. shoaraye bahar, Aref qazvini, Mirzadeh eshqi, Iraj mirza and Farokhi yazdi are of the most famous characters of Mashrooteh period literature that paid attention more than others to LIBERTY and Fatherland conceptions. Even after Mashrooteh establishment, these poets endeavored to establish its ideals, to combat the degenerated traditions and aristocratic class gaps. They were the honest sons of their own age and they had comprehended the social problems and needs of enlightenment period in a way that they should, and they recited them in their poems with clairvoyance, and discoursed on desires of lower class people and middle class people of cities with a simple and effective language.Two main indicators of their poems were patriotism and liberalism, and they knew how to attain law and justice in the shade of attaining LIBERTY. Although their comprehensions of such conceptions were somehow different: in Bahar’s viewpoint, LIBERTY and Fatherland for the most part meant independence wanting, in Aref and Eshqi’s viewpoints LIBERTY and Fatherland mostly meant combating traditions’ elements, combating dictatorship and building a flourishing and free fatherland. In Iraj mirza’s viewpoint it meant combating aristocracy and protecting painstaking people, and Farokhi’s viewpoint mostly had taken effect from notions of communal society as well as social liberties and stay within the law.By the way, the venerability of these poets was in their honesty, confidance, being socialize and having pure notions. In this article the mentioned cases have been studied and evaluated quantitatively by analyses and comparing poems and pieces of writings, and also by making use of the main resources related to life, poem and their notions.