通过研究经济学理论体系的发展历程,分析经济学在发展过程中与众不同的几个特点,包括伴随世界近代史的演进而迅速发展最终完善其理论体系、理论研究的重心逐渐从供给转向需求、主张自由放任和主张干预互相交织相辅相成,从而说明该学科的生命力和适应性的源泉。 By studying the course of the development of economic theory system, this paper analyzes several distinctive features of economics in the process of its development, including the rapid development and perfection of its theoretical system with the development of modern world history. The focus of theoretical research gradually shifts from supply to demand , Arguing that laissez-faire and advocating intervention are intertwined and complement each other, thus illustrating the source of vitality and adaptability of the discipline.