This book attempts to reveal Karl Marx’s philosophical critique of the social being in capitalist societies from the text of Capital. Marxists’ different understandings of Capital in different historical periods reveal the rich meaning of Capital, which plays an important role in promoting Marxian philosophy. These different modes of interpretation also mean that the understanding of Capital is endless, because re-reading of Capital will always open up a new realm for the interpretation of Marxian philosophy. Since the financial crisis in 2008, Capital has once again become a hot topic in academic fields. However, in these new interpretations, there is no fundamental breakthrough in the illustration of Marx’s thought, because some either stick to the discussions in pure economic fields, some the revision of Marx’s manuscripts from the perspective of literature compilation, others the role of Engels’ edition. The popularity of Capital mainly stays in a certain emotion and in the internal requirements of critical reflection on capitalist society.