This paper proposes a coordinated control strategy based on Multi-Agent and Petri-net technology to improve the security and economy of the new energy micro-grid’s electricity supply. The micro-grid is a typical hybrid system that includes many sorts of distributed energy resource units with different behavioral characteristics and multiple operational modes. Considering the complexity behind multi-mode behaviors, a Multi-Agent System is firstly constructed to implement distributed coordinated control strategy. Then, by using Petri net model, the multi-mode switching behaviors of the distributed energy resource units are described and the control strategies of their unit Agents are designed respectively. It is because that Petri net is one of the most useful tools for modeling the multi-mode system. On this basis, the coordinated control strategies are designed based on the Multi-Agent System platform. The effectiveness of the proposed control is demonstrated through simulation examples.