NOVELTY - The eco-friendly multi-layer power generating device (10) comprises a generator room (200) and a spinning wheel chamber (210) that is connected to a central axis (212) of a spinning wheel (211). A power generation chamber (220) is provided for generating the electricity. A recirculating chamber (300) is provided for recirculating the drained water in the spinning wheel chamber. A generator (221) is formed in the side of the spinning wheel chamber. A feed water pipe (242) is connected to the spinning wheel chamber. A water supply valve (243) is located inside the power generation chamber.    USE - Eco-friendly multi-layer power generating device for generating hydroelectric power.    ADVANTAGE - The eco-friendly multi-layer power generating device comprises a generator room and a spinning wheel chamber that is connected to a central axis of a spinning wheel, and thus enables reducing the cost and time for installation of the eco-friendly multi-layer power generating device. The influence of the water pressure is reduced. The installation space and occupied area of the eco-friendly multi-layer power generating device are reduced. The generation efficiency is improved. The repetition power generation is facilitated. The electricity is steadily produced. The installation and maintenance task are facilitated. The natural environment and ecosystem are protected through the environment-friendly development of energy. The promotion and economic ripple effect of the regional development are improved. The consumption of the energy is reduced according to the diversification of the industrialization.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional perspective view of an eco-friendly multi-layer power generating device.    Eco-friendly multi-layer power generating device (10)    Generator room (200)    Spinning wheel chamber (210)    Spinning wheel (211)    Central axis (212)    Power generation chamber (220)    Generator (221)    Feedwater pipe (242)    Water supply valve (243)    Recirculating chamber (300)