Method of implementing a flight control system for controlling a path of an electrically controlled rotorcraft , said rotorcraft comprising at least one movable aerodynamic manoeuvring member for controlling a movement of the rotorcraft , said rotorcraft comprising at least one actuator for moving said manoeuvring member , this flight control system comprising a flight control member movable by a human pilot and a processor unit suitable for controlling said at least one actuator , this method being characterised in that on each iteration and for at least a first type of interfacing - a step of generating a first path setpoint (STP1) by a setpoint generator , the first path setpoint representing a value to be reached by a first flight parameter; - a step of automatically generating a first autopilot command (STP2) by the processor unit from the first path setpoint by applying a first predetermined autopilot mathematical model; - a step of generating a first pilot setpoint (STP3) by the processor unit during which a movement of said control member is transformed by a first piloting-by-target model into a first pilot setpoint, said first pilot setpoint and the first flight parameter being homogenous in that they are expressed in the same measurement unit; - a step of generating a first human pilot command (STP4) by the processor unit from the first pilot setpoint by applying a first predetermined human piloting mathematical model; - a step of generating a first path command (STP5) by the processor unit by combining said first autopilot command and said first human pilot command; and - a control step (STP6) for controlling at least said actuator, during which at least one order is transmitted by the processor unit to said actuator, said order being determined by a servo-control module of the processor unit from at least the first path command and at least a current value of said first flight parameter. - a step of generating a first path setpoint (STP1) by a setpoint generator , the first path setpoint representing a value to be reached by a first flight parameter; - a step of automatically generating a first autopilot command (STP2) by the processor unit from the first path setpoint by applying a first predetermined autopilot mathematical model; - a step of generating a first pilot setpoint (STP3) by the processor unit during which a movement of said control member is transformed by a first piloting-by-target model into a first pilot setpoint, said first pilot setpoint and the first flight parameter being homogenous in that they are expressed in the same measurement unit; - a step of generating a first human pilot command (STP4) by the processor unit from the first pilot setpoint by applying a first predetermined human piloting mathematical model; - a step of generating a first path command (STP5) by the processor unit by combining said first autopilot command and said first human pilot command; and - a control step (STP6) for controlling at least said actuator, during which at least one order is transmitted by the processor unit to said actuator, said order being determined by a servo-control module of the processor unit from at least the first path command and at least a current value of said first flight parameter. <EOS>