Abstract-Demands on safe, high-quality and healthy food are unprecedentedly increasing in both emerging economies and advanced countries. Food safety incidents and scandals, frequently breaking out around the world, are significantly reducing the confidence of consumers in food safety and quality. It is even more difficult to achieve the full transparency, visibility and traceability of dynamic cross-border and global food supply chains, which is critical to ensure food safety and quality, due to: the personalization and globalization of consumer demands; the diversities of food products, raw materials and ingredients; the loose relationships between food business partners; the technology and resource barriers in aligning business processes, coordinating and sharing information; and the changing government supervision mechanisms and standards. Social networking technologies and social software are promising enablers to facilitate end consumers, food companies and government agencies to participate in open discussion, comments and feedback on the quality and safety of cross-border foods. They are able to connect, interact, communicate and collaborate with each other in loose, open, effective and flexible ways for enhancing the transparency and visibility of cross-border and global food supply chains through collective wisdom and intelligence. In this paper a framework is proposed for developing social networks enabling food traceability systems, which not only leverages enterprise Manuscript received November 8, 2013. This work was supported in part by the Guangdong Science and Technology Innovation Fund administered by Guangdong Provincial Department of Science and Technology of China under the Programme of Guangdong-Hong Kong Breakthrough Project in Key Areas (The project reference number: 2011A011303004), and by Shenzhen Strategic Emerging Industry Development Fund (The project reference number: ZDSY20120615142741201).Frank J. Xu was with the E-Business Technology Institute, The University of Hong Kong. He is now with the Department of Civil Engineering, The University of Hong Kong. He is also a member of Shenzhen Institute of Research and Innovation and Shenzhen Key Lab in Carbon Emission Enabling Technologies, The University of Hong Kong (corresponding author, phone: 852-2241-5791; fax: 852-2559-5337; e-mail: frankxu@ hku.hk) Victor P. Zhao is with the Emerging Technologies Institute (formerly as E-Business Technology Institute), The University of Hong Kong (e-mail: vzhao@eti.hku.hk). He is also a member of Shenzhen Institute of Research and Innovation and Shenzhen Key Lab in Carbon Emission Enabling Technologies, The University of Hong Kong. He is currently a PhD candidate of Shanghai University of Finance and Economics, China.Lu Shan is with Guangzhou Wanglaoji Pharmaceutical Company Limited, China (e-mail: shanlu@wlj.com.cn).Chuxiong Huang is with Guangzhou Wanglaoji Pharmaceutical Company Limited, China (e-mail: huangcx@wlj.com.cn) applications, public service platforms for food quality, safety and trace...