A kind of smoked gas tank of air hermetic gas, system can be to detect the efficiency of plant absorption gas, the air hermetic gas smokes gas tank system: a pressure box, with a cabinet and a closing plate, the posting port that the cabinet has a room and is connected with the room, the posting port system is given closed with dismountable closing plate, and the room system is an airtight space； One gas control valve group, to supply into and out of the room； And one detecting mould group, if in the what cabinet.一種氣密式氣體熏氣箱，係能夠用以偵測植物吸收氣體之效能，該氣密式氣體熏氣箱係包含：一氣密箱，具有一箱體及一閉板，該箱體具有一容室及與該容室相連通的一置入口，該置入口係以可拆卸的該閉板予以密閉，且該容室係為一氣密空間；一氣控閥組，用以供氣進、出該容室；及一偵測模組，設於該箱體內。
