Abstract: The current turbine which utilizes the surplus flow energy of cooling tower is only an indiscriminately usage of the traditional hydropower turbine.It can not effectively solve the issues, such as vibration and noise, short turbine life, vulnerable main shaft seal and leakage of water, regular damage of bearing, complicated maintenance etc..According to the specific structure and the arrangement of the cooling tower, as well as the amplitude of surplus flow energy of the cooling tower, a plum-type water turbine dedicated to cooling tower is developed.Taking the cooling tower with the treatment capacity of 1000 m³/h as example, the hydraulic and structural design of turbine is conducted, and the numerical simulation of the plum-type turbine is performed by using CFD technology.The structure of the turbine is optimized and the hydraulic design of it is improved according to the results of numerical simulation.The efficiency of the turbine is improved, and the purposes of more efficient and energy-saving of the cooling tower are achieved.