The use of renewable energy plays an important role in the sustainable development of our social economy and environmental protection. Wind power is now one of the fastest growing forms of renewable energy. these can be steady and predictable, providing a clean, safe and potentially limitless source of power. Now, Small wind turbines use the battery energy storage. Due to the randomness of the wind power and wind speed change range is larger, it is difficult to charge a battery. In this paper ,we will introduce a set of small vertical axis wind power controller system designed that is small size, light weight, high efficiency and energy saving, good load effect , good dynamic performance, reliable work and stable output .bridge rectifier circuit, MCU and its peripheral circuit, AD conversion circuit and serial communication circuit are put into use. charging control and discharge protection are controlled by microcontroller.