Traditional micro-grids in marine areas have the disadvantages of single energy, less participating in energy regulation of flexible loads, and simple grid structure. Against these disadvantages the functional architecture of multi-energy micro-grid in marine areas was designed in this paper. The micro-grid made full use of the characteristics of clean energy such as wave, wind and solar, and took advantage of VSG technology, to improve the stability of distributed energy generation. Energy router was treated as the control center of the micro-grid to realize controlling source-load interaction by adjusting flexible loads such as seawater desalination device and P2G device. Implementations of energy router, VSG, source-load interaction, CPS in micro-grid in marine areas were studied and applied to the micro-grid demonstration project in Cheniushan island.