Abstract: Abstract: Food safety has become a significant worldwide public-health issue. With the emergence of quality and safety issues for seafood products in China, these have become bottleneck for the sustainable development of the seafood industry. In response to the risk in the seafood supply chain and to improve the quality of the seafood products, a traceability system to ensure seafood quality is urgently required. The quality problems of seafood product can occur in any stage of the seafood supply chain, including breeding, processing, distributing and sales. Therefore not only policies and laws, but also technical support is needed to ensure the quality and safety of the seafood products and to reduce the safety hazards. In response to these issues, this paper has studied the design and development of a quality information traceability system of seafood using sea cucumber based on the seafood's production process. Tracking and monitoring of seafood products in the food supply process can be achieved with the participation of consumers and enterprises. This system contains several main function models: the process management, the data collection and management, the quality monitoring and tracing and the quality analysis. These function models' goal is to realize whole-course information traceability of seafood products from breeding, processing and distributing to sales. This system has the following characteristics: 1) It has a monitoring function of the seafood industry, and can track and trace progress information continuously from breeding, producing, processing and distributing to sales; 2) It leads to informationization on the production and management of seafood industries, and achieves the whole process monitoring of seafood's quality and safety through the construction of information technology; 3) Its functions facilitate industry management and supervision of seafood's quality for quality supervision departments; 4) Feedback information from quality inspection personnel or consumer will be dealt with promptly. In the process of design and development of the system, this paper analyzes the seafood traceability process based on the seafood's production procedure and establishes the model of process and product quality tracing based on the key nodes in the whole process. Furthermore, the paper constructs the frame work of the traceability system and studies the tracing models of seafood product quality based on the bill of lots of seafood products. The tracing models implements the positive and reverse tracing of seafood quality and guarantees the quality safety level of seafood. The quality information traceability system of seafood has been carried out in 2 companies, including the Dalian Diaoyudao Seafood Company Limited and Dalian Bangchuidao Seafood Company Limited, and has yielded a good effect on the turnover and market satisfaction of the products. At the same time, the study provides a good clue and reference for the establishment of a quality information traceability system for meat, vegetables and other foods.