The application of energy storage technology occupies an important position in micro-grid consisted of wind and solar power generation system, and ensures the stability and security of the system and the improvement of the efficiency and life span. A network of hybrid energy storage system is built, and a control strategy of VSC based on current inner loop and power control outer loop and a control strategy of DC / DC based on slip average filter are proposed. An analogy micro-grid by Matlab is built and verified, the result shows that the application is reasonable and effective. At the same time, the combination of the advantage of storage battery in high energy density with that of super capacitor in high power density can improve the flexibility and widen the application fields of the whole system.