The fiercer competition among international harbors drives every port to reinforce operation efficiency to attract carriers and to develop competition strategies to grow competence. In those years, Kaohsiung Harbor has slumped from the third to the fifth largest carrier harbor in the world. It is the overall symptom of competition risks for seaports in Taiwan. The severe situation, though, it is exactly what we can strive to revert the declining trend. Facing this topic composed of dynamic complexities, we can leverage systematic deliberation and dynamic simulation to revamp the status quo structure and create beneficial behavior model. In this thesis, we adopt system dynamics to build up a typical dynamic harbor model to dig out the crucial facets key to the growth of an international seaport and henceforth serve for basis of the decision-making. The main conclusions of this research are as follows: 1.The four facets that influence the development of a harbor are ¡§The economic strength of the hinterland,¡¨ ¡§The completeness of the harbor facilities, whether the construction of the harbor can keep in pace with the volume of containers,¡¨ ¡§The openness of the harbor,¡¨ ¡§The superiority of the geographic location.¡¨ 2.Whatever the import, export, or even transfer, the rate policy of a harbor will help little to the growth of the volume of containers with the other conditions unchanged. The disastrous effect of rate slash will be revenue decline; keeping volume while losing profit. In the long term, it will become a viscous circle. The freedom policy will be far more important than rate policy according to our policy analysis. 3.If the construction progress of wharfs can be in pace with the growth of enterprises, it will lower the interference between each other, reduce inefficient investment, and increase inter-stability. It¡¦s therefore the more accurate estimation of the growth of a harbor, the less disturbance effected by the other loops.