Abstract: With the coming of the new era of energy, the maturity of distribute generation technology, the complexstructure of micro-grid, the traditional power grid is revolting towards the energy Internet. While multi-DG operating in parallel, to optimize the capacity and access to the location of DG, to maximize the effectiveness the advantage that saving energy and reducing emission of DG, become a hotspot of modern power industry technology. This article aim at the micro-grid with multi-DG, propose a comprehensive optimizing control method, with the goal of energy and environmental protection, in the operating, with the goal of minimum the generating cost, the CO2 emission, power loss, transform the index into economics factor first, computing the micro-grid total economic best running state, then give weight to each index, establish the multi-objective collaborative optimization model, through the change of various index weight to meet the different require optimization running state.