1. A system of controlling a line of sight of a vision device based on motion commands, the system comprising: a movable body; a driving unit which receives a motion command for driving the body; a vision device driven by being connected to the body, configured to be capable of changing the line of sight independently from the body, and receiving image information; a first control unit which receives the motion command used for driving the body, calculates an estimated motion information of the body using the received motion command used for driving the body, generates a control signal for rotating the vision device rightward or leftward and for moving the vision device to change the line of sight of the vision device so as to compensate for an estimated influence caused by the motion command on the body using the estimated motion information, and rotates the vision device rightward or leftward and moves the vision device to change the line of sight of the vision device to a direction different than a direction of the motion of the body using the control signal; an image processing unit which calculates a position of a predetermined target in the image information received by the vision device; a second control unit which moves and/or rotates the vision device in accordance with a comparison result between a predetermined reference position and the calculated position of the predetermined target calculated by the image processing unit; a detection unit attached to the body and measuring disturbance generated in the body; and a third control unit which moves and/or rotates the vision device so as to compensate an influence caused by the disturbance measured by the detection unit, wherein the motion command comprises information which defines a linear or angular motion of the body, the information comprising at least one of a movement distance, a rotary angle, and a destination, wherein the first control unit calculates an angle formed between the body and the predetermined target based on the estimated motion information and generates the control signal based on the calculated angle, wherein the control signal comprises a movement distance of the vision device, wherein the detection unit comprises at least one of an encoder, a distance sensor, a landmark device, and an indoor GPS device, and wherein the disturbance is an error between a movement path of the movable body and an actual movement path of the movable body.