Abstract: A circulating hydroelectricity generating and energy storing apparatus includes a carrier, a water-supply tank settled at a top of the carrier, and a water-storage tank settled at a bottom of the carrier. The carrier contains a draining channel connecting between the water-supply tank and the water-storage tank. The water-storage tank is pivotally provided with a first waterwheel that drives a water pump, wherein the water pump is connected with the water-supply tank. A generator of a hydroelectric device is settled beside the draining channel while a second waterwheel pivotally equipped to the generator has a bottom received in the draining channel. Thereby, water passing through the draining channel rotates the second waterwheel and enables the generator to generate electricity. Afterward, the water impacts the first waterwheel to drive the water pump to draw the water back to the water-supply tank so as to recycle the water used in power generation.