An intelligent recognition algorithm of the combination of image edge detection and image area segmentation is designed in this paper. The image edge detection adopts the edge detection method of color feature space. The color multi-threshold region segmentation method is used the image area segmentation. The algorithm is mainly used for the detection and location of city road traffic signs. Some traffic scene images are processed by this algorithm. The simulation results show that the combination algorithm has better segmentation ability. It is helpful to realize the intelligent recognition of road traffic signs.