A movable apparatus drive system comprises a driving device for the movable apparatus, a first output device for detecting environmental information around the movable apparatus and for outputting a corresponding signal in response to the environmental information data, a second output device for outputting a command signal to drive the driving device so as to move the movable apparatus to a target position, based on target position data of the movable apparatus to be moved and current position data of the movable apparatus; and a supply device for supplying a composite signal constituted by the environmental information data and the command signal.Moreover, a robot control system comprises a control device for controlling the motion of a robot in response to a command signal to the robot; a spring mechanism provided at a working point of the robot for detecting a deflection (displacement ) caused by an external force applied to the robot; and a feedback means for feeding back a deflection feedback value obtained by multiplying detected output of the spring meachnisum by a predetermined gain. The control device controls the motion of the robot in response to the addition of a position command generated from the control means and the deflection feedback value.