A hydropower generating system includes a pump, a container data center, and a hydropower generating module. The container data center includes a number of cooling pipes. Each of the cooling pipes includes a water intake and a water outlet. The water outlet is connected to the pump. The pump is for pumping water from a source to the cooling pipes. The water flows along the pipes to dissipate the heat generated by the container data center. The hydropower generating module includes a turbine and a generator. The turbine is arranged under the water outlet. The hydropower generating module is electrically connected to the pump. The water flowing out from the water outlets is able to turn the turbine, causing the turbine to drive the generator to generate electrical power, the generated electrical power is supplied to the pump.