An energy trading method and system based on a dynamic price and demand of renewable energy are disclosed. The energy trading method includes receiving, from an energy consumer, demand information including a demand for energy required by the energy consumer, determining a amount of generation of an energy provider that is required to satisfy the demand from the energy consumer based on the demand information, determining a generation price to be paid by the energy consumer to purchase energy based on the amount of generation, and determining an energy trading with the energy consumer based on the generation price. The energy provider provides energy to the energy consumer according to the energy trading.