In order to enhance the high efficiency, real-time performance and stability in the process of digital image acquisition and recognition, a system based on Altera Cyclone IV E series EP4CE10F17C8 FPGA as the main control chip and SCCB transmission protocol is designed.The system uses the OV5640 camera as the front end of image acquisition. The collected digital image data is cached to the external SDRAM, and then the data is read from the SDRAM to carry out color space conversion, binarization processing, projection segmentation and feature matching recognition by LCD driver.Finally, the identification results are displayed by digital tube and RGB LCD screen.For printed numbers, the system can realize fast and accurate identification, suitable for low delay and high demand on identification accuracy.