The invention relates to the field of aerostat bag body pressure adjusting control, in particular to an integrated inflating and deflating device. The integrated inflating and deflating device comprises a valve body and a valve core, a hollow inner cavity is formed in the valve body, a first air hole used for communicating with the interior of an air bag, and a second air hole used for communicating with the outside atmosphere are formed in the valve body, the valve core is movably assembled between the first air hole and the second air hole so that the first air hole and the second air hole can be switched among a first working station, a second working station and a third working station, specifically, at the first working station, the first air hole is closed, and the second air hole is opened; at the second working station, the first air hole and the second air hole are opened simultaneously; and at the third working station, the first air hole is opened, and the second air hole is closed. The valve core and an inflation fan are integrated. According to the integrated inflating and deflating device for the aerostat, inflating and deflating of the aerostat are designed to be integrated, the valve core and the inflation fan are integrated, so that the inflating and deflating structure of the aerostat is greatly simplified, operation is simpler and more flexible, the response speed is increased greatly, meanwhile, the structure is lighter and more reliable, and loads of the aerostat are lowered.