1. An apparatus for detecting a bar-type sign in a traffic sign recognition system, the apparatus comprising: a traffic sign detection unit for receiving image information including a traffic sign from a camera module, and detecting a traffic sign from the image information; a recognition region setting unit for setting a recognition region for detection of a bar-type sign on the traffic sign detected by the traffic sign detection unit; a PCA operation processing unit for applying a PCA algorithm to all pixels in the recognition region set by the recognition region setting unit, and determining an eigenvector; and a sign determination unit for determining a deviation of an angle from the angle of the eigenvector, comparing the deviation with a threshold value, and determining whether the traffic sign corresponds to a bar-type sign.