The utility model relates to a transformer breather transferring device with the air pressure monitoring and air charging functions. The device comprises an H-shaped communicating pipe which has the same size as that of a transformer breather communicating pipe; a first opening connector of the H-shaped communicating pipeline is connected with an air pressure meter through a flange and a rubber pad; a second opening connector which is positioned below the first connector and directly communicated with the first connector is connected with an air charging back joint; the air charging back joint is blocked through a cover plate and the rubber pad when the transformer runs; when overhauling and charging air, the pipeline connection of the cover plate and an air charging pump is cut off to charge air; a connecting flange is arranged on a third opening connector which is parallel to the first connector on the H-shaped communicating pipe; the connecting flange is connected with an oil conservator capsule of the transformer during use; the flange is arranged on a fourth opening connector which is positioned below the third opening connector on the H-shaped communicating pipe, and the flange is connected with a transformer breather during use. The device is simple in structure, and outstanding in effect, and solves the problems in the prior art.