The utility model relates to a culture gas supply device, comprising: a switch capable of switching between a shutdown mode and a power failure activation mode； an internal power supply unit for providing an internal power； and a judgment control module having a judgment control unit； and a gas supply module electrically connected to the break control unit for receiving the internal power to provide a gas； thereby, when the switch is in the off mode, the gas supply module is not Actuating； when the switch is in the power-off start mode, the determining control unit determines whether the external power supply unit provides an external power, and if yes, the air supply module does not act, and if not, the supply The gas module receives the internal power to provide the gas, thereby effectively extending the life of the aquatic organism in the water tank.本新型為一種養殖用供氣裝置，包含：一切換開關，能夠在一關閉模式與一停電啟動模式之間切換；一內部電力供應單元，用以提供一內部電力；一判斷控制模組，具有一判斷控制單元；以及一供氣模組，電性連接該斷控制單元，用以接收該內部電力以提供一氣體；藉此，當該切換開關在該關閉模式時，該供氣模組不作動；當該切換開關在該停電啟動模式時，該判斷控制單元判斷該外部電力供應單元是否有提供一外部電力，若為是時，該供氣模組不作動，若為不是時，該供氣模組接收該內部電力以提供該氣體，藉以有效延長水缸內水中生物的生命。
