The correct understanding of the communist ideology in Das Kapital should not be limited to examining “what communism is”, but rather to the questioning the “self unfolding process of communism content”, in other words, exploring the generation process of communism in Das Kapital. It discloses all the secrets of “capital” through “three major criticisms”, and further elucidates the historical collapse fate of capitalism and the emergence of communism. From a philosophical perspective, Das Kapital reveals the emergence of communism which is characterized by the free and comprehensive development of all people, with a critique of the subjectivity of capital. From the perspective of political economy, Das Kapital elucidates generation and disintegration of communism by a critical analysis of the logic of capital operation. From the perspective of scientific socialism, Das Kapital criticizes the impossible utopia socialism of preserving the capitalist form of production but carrying out socialist transformation , and opens up a realistic path of communism.