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The design mind of SOPC (System on Programmable Chip), hardware & software co-design, will bring the system optimization with larger degree of freedom. It will establish the foundation on realizing the miniaturization and more efficient local preprocessing in smart cooperative sensor networks. In this contribution, a solution is proposed for smart multimedia sensor nodes based on the SOPC framework, aiming at improving the on-board processing capability and the degree of freedom in development. This paper mainly presents the structure and design method of the smart cooperative multimedia sensor node based on SOPC. The on-board feature extraction is realized and some correlative experimental data and results are presented as well. The experimental results evaluate the feasibility and efficiency of the proposed node design method.