A carbon dioxide energy storage device accumulating high-temperature radiant heat energy in a burner hood comprises the burner hood, a CO2 fluid energy storage mechanism is arranged on the inner wall or the outer wall of the burner hood, a medium inlet pipeline is arranged at an inlet of the CO2 fluid energy storage mechanism, and a medium outlet pipeline is arranged at an outlet of the CO2 fluid energy storage mechanism. The carbon dioxide energy storage device can solve the high-temperature erosion problem of the burner hood by the high-temperature intensive radiation heat energy and reduce environment heat pollution hazards; and intensive radiation heat energy in the burner hood can also be used for power generation.