从事实出发是马克思1845年后研究经济学最根本的研究立场。马克思的《资本论》创作是严格从经济事实出发研究经济学的典范,研究和发现经济事实及其之间的内在联系是实现其经济学理论科学性的根本前提。马克思对蒲鲁东从抽象原则研究经济学的立场的批判表明了他对从事实出发研究问题的立场的肯定。马克思不仅自我意识到从事实出发研究问题的极其重要性,而且在《资本论》中以经济事实为根据,研究了资本主义生产方式发生、发展和灭亡的规律,为工人阶级革命提供了强大的科学的理论武器。 Starting from the facts is the most fundamental research position of Marx after 1845 in research economics. Marx’s creation of “capitalism” is an example of studying economics strictly from economic facts. Studying and discovering economic facts and the internal relations among them are the fundamental preconditions for realizing the scientific nature of their economic theory. Marx’s critique of Proudhon’s position in studying economics from abstract principles shows his affirmation of his position on the question of fact-based research. Marx not only self-aware of the extremely importance of studying the issue of fact starting, but also studied the law of the occurrence, development and demise of the capitalist mode of production on the basis of economic facts in Capital Theory and provided a powerful Scientific theory of weapons.