1. An endoscope system, comprising: a medical device for applying medical care to a subject by changing at least a part of a shape of said medical device; a driving means for actuating said medical device; a movement detecting means, having at least one sensor for receiving signals from at least one signal source, for processing said received signals, and for detecting a movement of an operator who operates said medical device; and a control means, operably connected to said movement detecting means, for controlling said driving means to actuate said medical device and for changing at least a part of a shape of said medical device according to said operator's movement which is detected by said movement detecting means, wherein said movement detecting means includes a means for detecting a movement of one of an operator's hand and an operator's head, and a superimposing means for superimposing an image associated with the movement of one of the hand and head on an image which an imaging means generates.