1. A gesture recognition apparatus, comprising: a camera detecting an input image; a human detection unit detecting a face region of a user from the input image; a gesture region setting unit setting a gesture region, in which a gesture of the user's arm occurs, with respect to the detected face region; an arm detection unit detecting an arm region of the user in the gesture region; and a gesture determination unit analyzing a position, moving directionality and shape information of the arm region in the gesture region to determine a target gesture of the user, wherein the gesture region setting unit sets the gesture region which comprises a left upper region which is disposed in an left upper portion of the head region, a right upper region which is disposed in a right upper portion of the head region, a center upper region which is adjacent to the head region and is disposed between the left upper region and the right upper region, a left lower region which is adjacent to the head region and is disposed at a lower portion of the left upper region, and a right lower region which is adjacent to the head region and is disposed at a lower portion of the right upper region, with respect to a position of a head region comprising the face region, wherein the gesture determination unit determines the target gesture which comprises a waving gesture which repeatedly shakes any one of a right arm and left arm of the user from side to side, a calling gesture which repeatedly shakes any one of the right arm and left arm of the user upward and downward, a raising gesture which maintains a state, where the user is holding up any one of the right and left arms to at least face height, for a certain time, and a stopping gesture which maintains a state, where the user is holding up the right and left arms to face height, for a certain time.