In a wind-powered thermal power generation system, an induction motor includes a field (rotor) which has a field core coupled to a rotation shaft of the wind turbine and a field conductor, and an armature (stator) which has an armature core arranged on the outer side of the field with a spacing therebetween and an armature winding, and the induction motor is housed in the heat insulating container. A heating medium circulation mechanism circulates, inside the heat insulating container, a heating medium that receives heat generated by the induction motor. A magnetic field control means controls an input current to the armature winding so as to result in slip that produces load torque at the rotor rotating due to rotation of the wind turbine. A power generation portion converts, into electricity, the heat of the heating medium heated by the induction motor.