Aiming to guarantee the whole-process quality control of the Eriocheir sinensis crab seedling breeding and accomplishment of the Shanghai-Taiwan Crab Seedling Transport mission, This paper is based on the technologies referring to the Internet of Things (IOT) and smart service in which the crab seedling quality dynamic traceability system is researched and developed. In allusion to the Cross-Strait complex network situation and chanceful logistics links, several kinds of computing nodes and software patterns are adopted for the purpose of the acquisition of applied information in the system. Meanwhile, it plays an exemplary role in the field of Eriocheir sinensis crab seedling aquiculture for the reason that the quality control, dynamic monitor and traceability and tracking smart service of Cross-Strait crab seedling is brought into effect by means of the uniform data and information exchange between the coordination service space and intelligent resource base. The system has been resoundingly applied to the whole process of the Shanghai Eriocheir sinensis crab seedling aquaculture and transport to Miaoli Taiwan in 2013 and rendered the smart quality traceability service to 770,000 crablets in 695 boxes of 9 batches. The thirty Taiwanese exemplary aquaculture households have realized the quality tracking for the crab seedling with the 100 percentage traceability rate of crab seedling boxes and pouches. This has achieved desirable effects both in politics and economics.