Abstract: As a new research hotspot after microgrid, the multi-microgrid system, formed with a number of neighboring microgrids in a certain region, can enhance the reliability of power supply and improve the permeability of distributed generations through energy dispatching and reciprocal energy-feeding. The analysis on the configurations and typical characteristics of multi-microgrid system and the study on detail application scenarios are the base of its scale applications. In this paper, the existing multi-microgrid projects at home and aboard are summarized. And the typical application scenarios of multi-microgrid system are analyzed according to such four categories as AC/DC bus structures, grid voltage levels, phase sequence types and series-parallel configuration modes. In the end, a comprehensive overview of the typical characteristics and applications of multi-microgrid system is given, which can provide reference for multi-microgrid related researchers.