The Contracts of carriage by sea is one of the most important legal issues in the “three direct link” between Taiwan and Mainland China. It is a topic where a comparative approach is particularly revealing, not only as to differences between the common law and civil law worlds but also as between one common law jurisdiction and another ,and as between one civil law jurisdiction and another Hence, this paper has its special meanings in dealing with conflict of laws in maritime law cross strait while political situation is divided but economical harmonization is so close. This article is discussed into two major parts : comparing the law of conflicts and examining the principle of autonomy of the party in International carriage contract by sea through the theory、present law、court opinions and model law of commercial private international law