This paper shows that Feuerbach plays a vital role in Marx’s realization of philosophical revolution. On one hand, only when Marx himself has doubts on Hegal’s speculative philosophy does the theory of Feuerbach come into his theoretical sight. On the other side, such an indispensable link isn’t a religious criticism but an essentially philosophical criticism. Marx goes to great lengths to criticize, reformulate, and adopt Feuerbach’s ideas and make them as both a start of his philosophical revolution and a prominent theoretical stage owing not only to Feuerbach’s religious criticism of Hegal’s speculative philosophical theory, but also to Feuerbach’s own conception of a new philosophical world, using the ideas of “species nature” and “human in reality” or simply “human in society.”