Big Data recently has become a new ubiquitous term to describe large datasets that are challenging to store, search, share, visualize, and analyze. Effective management and analysis of the Big Data would bring great benefits and unique opportunities to the users. However, the conventional methods are limited on providing desirable operations on Big Data. The Big Data workshop 2014 (BigData 2014) is to promote research works in this emerging area of Big Data-inspired computing, networks, systems, and applications. BigData 2014, held in conjunction with CyberC 2014, aims to provide a leading forum for sharing and exchanging experiences, new ideas, and research results on broad topics of Big Data Research, Development, and Applications. It solicits high quality papers that illustrate novel Big Data models, architecture and infrastructure, management, search and processing, security and privacy, applications, surveys and industrial experiences. Authors of Big Data workshop 2014 are promoted to freely enjoy CyberC 2014 and Big Data Summit. Both of the events are co-sponsored and participated by several Big Data related industry companies.