The invention relates to a generator for three kinds of aircrafts, an aerological station, a wind power boat and a high-altitude water taking machine, and relates to an annular rotor wing mechanism. In the mechanism, the axis of a rotor wing and an inefficient/poor-efficient wing segment are saved, and an annular double-wing structure which rotates reversely is adopted, so that the radius of the rotor wing is not increased, the shape of the generator is not expanded, the speed of a rotor is not improved, the electromagnetic load is not increased, and the capacity of the generators is manyfold enhanced; a rotor aircraft obtains huge bearing capacity and agility; the aerological station which can be permanently suspended, is self-sufficient in energy and has huge bearing and hoisting capacity is built at a low cost; a boat driven by high-altitude wind and power is built; and a large-size high-altitude water taking machine which is self-sufficient in energy is built.