An oxygen filling and selling device is provided with an air compression device, a pressure swing adsorption oxygen generator and an oxygen storage bottle in a vending machine, so that air is sent into the pressure swing adsorption oxygen generator via the air compression device. The continuously produced oxygen is then stored in the oxygen storage bottle, and the oxygen storage bottle is sequentially connected to a gas pressurizing device, a high pressure storage oxygen bottle and a filling and pressing device, so that the above is obtained. The oxygen is then stored in a high-pressure storage oxygen cylinder via a gas pressurization device in a high-pressure manner, so that the consumer can put the empty bottle filled with oxygen into the filling and pressing device, so that the oxygen in the high-pressure storage oxygen cylinder can be It is filled by a filling pressurizing device, and the oxygen is conveniently sold.一種氧氣填充販賣裝置，係在一販賣機內設有依序連結的一空氣壓縮設備、一變壓吸附製氧機、一氧氣儲存瓶，令空氣經由空氣壓縮設備輸送入變壓吸附製氧機而連續製得的氧氣後，再儲存於該氧氣儲存瓶中，復令該氧氣儲存瓶又依序連結至一氣體增壓設備、一高壓儲存氧氣瓶與一填充加壓設備，令前述製得的氧氣再經由氣體增壓設備以高壓方式儲存於高壓儲存氧氣瓶內備用，進而讓消費者將其用畢氧氣的空瓶放入該填充加壓設備上，讓高壓儲存氧氣瓶內的氧氣可以透過填充加壓設備進行填充，而達氧氣簡便販售的目的。
