The invention discloses a gas bag type suspending flight device comprising an outer gas bag (1) and an inner gas bag (2) allowing for injecting of hydrogen (4). A plurality of square gratings (3) allowing injecting of inert gas (5) are arranged between the outer gas bag (1) and the inner gas bag (2). Gas inflation valves (6) and a control device (7) are arranged on the outer gas bag (1). The gas inflation valves (6) communicate with the inner gas bag (2). A device (8) for conveying goods is arranged at the bottom of the outer gas bag (1). According to the gas bag type suspending flight device, the inner gas bag (2) fully filled with the hydrogen (4) of the gas bag type suspending flight device is not liable to break because of protection of the outer gas bag (1) and the square gratings (3) fully filled with the inert gas (5), even if one or more square gratings (3) leak gas, flight of the gas bag type suspending flight device is not affected, and therefore the gas bag type suspending flight device has the advantages of being large in carrying capacity, easy to maintain and operate, long in service life, simple in structure, high in safety and speed, low in cost and the like.