Abstract: Sponge city concept is of great significance for control pollution and promoting water resource utilization in industrial area. Based on the example of a gas-turbine power plant in Zhuhai, how to apply the “sponge city” concept in rainwater drainage system design as for the area of power plants was discussed. Sponge facilities, including rainwater garden, grassed swale and constructed wetlands, were applied in this project, combined with the rainwater pump house built completely underground. With these engineering measures, the power plant’s volume capture ratio of annual runoff reaches 77.5% and suspended solids reduction rate by annual rainfall reaches 65.86%. The rainwater drainage system of power plants not only realizes the goal of reducing runoff flow, controlling pollution as well as saving water and energy, but also corresponds with the trend of deindustrialization of modern power plants.