From the point of the roles of both the active and negative aspects of the objective rational , this article adopts the theory of law positivism and the method of law economy analysis to discuss the roles and limitation of the meaning of the intention components of causality and the ultimate aim of the objective rational , and the internal economy principles or rules of the shipping economy and trade deduced from the shipping facts and the benthamism , the most avail of the most majority nations , the maximum of the whole avail of both the ship interests and the cargo interests , and the protection and promotion of the development of the shipping economy in the legislation area of the basis of liability of the carriers 摘要从目的理性在消极方面和积极方面作用角度出发，运用法律实证主义理论和法律经济分析方法，论述了因果方面的目的成分的意义、目的理性的终极目的，以及从航运事实和功利主义所引出的航运经济与贸易内在经济法则或规律，最大多数国家的最大效用、船货双方整体效用最大化与促进保护航运经济发展，在承运人责任基础立法领域中的作用与局限性。
