Abstract: It is difficult to count the bar sections moving at high speed on production line. To solve the problem, the line scanning camera is utilized to acquire the images of moving bars so as to recognize the centroid coordinates of the bars' ends and compute their area with a Blob algorithm, and a heuristic tracking algorithm is developed to track the moving bars' ends in relation to the interframe data. A hardware/software system is therefore developed for real-time recognition and tracking of the bars moving at high speed. First, hardware platform is set up and the system's parameters are determined. Second, the software system is developed on the basis of Visual Studio 2005. The experimental results showed that the system can well count bars moving at high speed on production line, with a counting accuracy near to 100% and a recognizing time in millisecond.