Robot device and control method thereof

The invention provides a control method used for a robot device, comprising the steps as follows: when the manipulator of the robot device is controlled, a plurality of benchmark images are not needed to be prepared, rapid control can be carried out owning to light calculation load; furthermore, the position and gesture of manipulator correspondingly to the object can be controlled in three-dimensional space; according to the moving quantity of image of object (101) which leads the direction of the paw of the manipulator (1) to rotate in the image photographed by a camera (6), the direction of the paw of the manipulator (1) is controlled, thus leading the image of the object (101) to be arranged at the center of the visible field; according to the size of the image of the object (101) gained by the camera (6), the distance of the paw and the object (101) of the manipulator (1) is calculated, thus leading the paw of the manipulator (1) to move along the direction of the optical axis of the camera (6) so as to approach the object (101).