The system of pseudo-color coding of real-time image based on DSP is introduced, and the hardware designation and software realization are described in detail. The hardware is the single input and output structure with DM642 as CPU. The software is carried out in single-track pipeline way orderly. These approaches improve the efficiency of the implementation of the programs, and meet the requirements of real-time and stability. In the end, the experiments of this project and practical effects are introduced.