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In order to accurately detect the welding perpendicularity of column components on circuit board, a perpendicularity identification system based on DSP+FPGA was developed, in which DSP is responsible for core algorithms and FPGA functions as a unit of data preprocessing for the purpose interface logics, system interconnection and data channel. An algorithm of verticality recognition based on centroid registration of components is embedded in the hardware platform. This method, first obtains element's pixel edge of pre-treated pictures using improved Canny algorithm, then rejects noise point and interference edge through edge track method and numbers the elements at last. The element's sub-pixel edge is obtained at the edge subject to crude extraction with the aid of Zernike moment algorithm. On the basis of this, the minimum circumscribed rectangle of the element's contour is obtained to correct the edge and get the areal coordinate. so as to inspect and measure perpendicularity of each element according to displacement of the centroid. The experimental results show that the design scheme of the verticality recognition results recognition system with high accuracy, fast detection speed and meet the real-time requirement, it has important practical engineering significance.