Abstract: An electromagnetic variable-speed motor includes a rotor having a plurality of permanent magnet structures, a stator disposed on the same axis as the rotor and having a plurality of teeth and a plurality of slots, and a variable-speed module disposed on the same axis as the rotor and the stator and at a position between the rotor and stator. Therein, the pole number of the variable-speed module no greater than the number of the slots such that the variable-speed module can be completely integrated with the stator, thereby providing a simplified yet strengthened structure which requires less components and fabrication costs than the prior art.