Abstract: A hybrid renewable energy supply system is mainly applied to a stationary or mobile actual mass-production power generating operation to transform a lot of organic waste into electric energy using a gaseous biomass power plant, and may be combined with renewable energy such as solar energy, wind energy, micro-hydro energy and the like, thereby providing a self-operating system without using mains. The gaseous biomass power plant can use an organic material source, such as food wastewater, livestock farming wastewater, agriculture waste or the like, to generate a biomass gas, thereby possessing dual effects of waste recovery and clean energy production. The hybrid renewable energy supply system comprises at least one renewable energy device for transforming nature energy into electric energy; and an electric energy control device, which connects the renewable energy device to a mains grid and controls storage and output of electric energy of the renewable energy device.