Many people focus on research of computing cloud platform technology, but few people know management about cloud platform. In this article, it takes agri-product logistics as a case, discusses how to build synergetic management system of agri-product logistics based on cloud service platform from its layers and mechanism view. The synergetic management system can be divided into 3 layers: strategy layer, operation layer and support layer. And its mechanism includes the self-organizing mechanism, negotiation mechanism, trust mechanism, interest mechanism and punishment mechanism etc. It can improve efficiency of the agri-product logistics by synergetic management system based on cloud service platform.