A rotary electric machine control system (10) includes a controller (70), and a rotor (28) including a first rotor element (40) and a second rotor element (42) which are rotatable inside of the stator (24) and disposed to be separated from each other in axial direction. The first rotor element (40) includes a first magnet and is fixed to a rotary shaft (26). The second rotor element (42) includes a second magnet, and is rotatably provided to the rotary shaft (26). The controller (70) performs vector control of the stator coil current for transition of an inter-rotor phase, a relative phase difference of the second rotor element (42) in relation to the first rotor element (40).