The utility model discloses a system fuel reaction system, include: the electrolytic hydrogen production device, power supply unit is connected with the power plant for the peak regulation surplus electric quantity that uses the power plant is power electrolytic hydrogen production, system fuel response device for utilize hydrogen and carbon dioxide preparation fuel, the hydrogen delivery line ofelectrolytic hydrogen production device is connected to system fuel response device's an input, and carbon dioxide is connected to another input provides the source, and fuel collection device or fueloperative installations are connected to the fuel take -out mouth. Above -mentioned system can directly consume the peak regulation electric quantity of power plant, has alleviated the balanced and poor problem of peak valley of electric wire netting, has prolonged power plant equipment's life, has realized the covert storage of electric energy, has realized that stable storage of the energy is utilized with effective. The utility model also discloses a power plant peak shaving system and power plant that is including above -mentioned system fuel reaction system.