Moral utilitarianism is one of the issues underlying utilitarianism among Western thinkers. At the forefront of this debate is John Stuart Mill, who found out the utilitarianism of morality after designing the classical liberalism in the realm of morality based on the philosophical basis of utilitarianism. To him, utilitarianism in life brings about most happiness for a person. The goal and purpose of utilitarianism in morality is to maximize joy and happiness. As regards sacrificing oneself for others, this happiness assumes a moral value and expresses utilitarian morality. Based on the findings of this study, moral pluralism, libertinism, and exploitation of material pleasures to the maximum for the happiness of life are the results of utilitarian morality. Allameh Ja’fari presents serious challenges to the foundations and components proposed in Mill’s thought. He considers human-centeredness, survival conflict, the originality of pleasure and the originality of utility as the basis of Mill’s ideas and introduces them as the cause of deviation and destruction of humanity. Using a descriptive-analytical method, this research first discusses Mill’s thought and then with a critical analytical method, critiques his theory based on the intellectual system of Professor Mohammad Taqi Ja’fari.