Based on the understanding of maritime industry, this paper focuses on the discussion on the special characteristics of the maritime natural bases and the difference between maritime industrial structure and terrestrial industrial structure, and analyses the reason why there appears so great difference between these two types of industry from the perspective of the technical condition and the possibilities of the transition from terrestrial industry to maritime industry. It tries to argue that the complex ecosystem around the coastal region (the terrestrial and maritime ecosystems) is the natural foundation of industrial links. But as the maritime industry depends heavily on the development of the terrestrial industry in technologies and spaces, it is necessary for the unification of these two industries. The authors discuss how to realize the unification of maritime and terrestrial industries in the coastal area of China in these main view-points how to develop the near coastal area industry, how to draft a unified strategy and how to balance these two eco systems.