A new black and white color selection system based on ZYNQ-7000 series fully-programmable SoC is designed to solve the problem of slow detection speed and low integration of traditional black and white color selection system. Using hardware and software co-design methods, firstly linear CCD image acquisition, grayscale correction, threshold comparison and valve output are implemented on the PL side. Then using the AXI interface to cache the compensated grayscale value, valve output signal, and setup parameters to the DDR3 SDRAM memory, and finally The PS side is ported to an embedded Linux operating system for real-time display and human-computer interaction. The experimental results show that the system can effectively measure the eigenvalue parameters of the materials with screening, and carry out the selection, the operation is stable and reliable, and meets the requirements of industrial applications.