Under the influence of low-level load during the Spring Festival, the thermo electric generating set of Jiangsu grid fails to open enough thermal generators, leading to the difficulty in regulating peak and valley load. The valley load period during the Spring Festival is just the period when renewable energy, such as wind and photovoltaic, reaches its peak in generating power, renewable energy generation is forced to participate in regulating the load at a low capacity, adding a negative effect on the full utilization of renewable energy. To deal with the above problems, State Grid Jiangsu Electric Power Company organized the first provincial “valley shaft”demand response during the Spring Festival (Feb.16th-18th), providing the load of 1.68 million kilowatts at one time and 9.28 million kilowatts in total. This action efficiently alleviates the pressure on regulating the power load, assuring the full utilization of the renewable energy generation in this region.