Optimization allocation plays an important role in micro-grid’s construction. An optimization method for multiple targets is proposed with the consideration of economy, stability and weather following of residential districts. Firstly, a set of wind-solar complementary coefficients for weather tracking and the mathematical model through three ranks are designed after giving the objective functions and constraint conditions. Besides that, a method for loads classification is put forward. Secondly, the crossbreeding particle swarm optimizer and the wind-solar complementary coefficient are used to improve the gravitational search algorithm, and an optimization allocation of wind driven generator, solar panel, diesel and storage battery is obtained after analyzing distribution of loads in the micro-grid. Finally, four cases are compared and analyzed in terms of economy, weather following, domestic energy structure and load fluctuation endurance. The result verifies the reliability of the proposed model. This work is supported by National Natural Science Foundation of China (No. 61273151, No. 61004053, and No. 51376096).