The book "Big Data Computing and Communications" documents the proceedings of the first International Conference on Big Data Computing and Communication, which took place in August 2015 in Taiyuan, China. This volume contains 41 carefully selected and peer-reviewed contributions from a total of 74 submitted papers. The contributions are divided into thematic sections that cover various aspects of Big Data technology, including wireless communication and networks, databases, security and privacy issues, as well as applications in social networks and signal processing. This collection provides a comprehensive overview of current research findings and developments in the field of Big Data technologies and their applications.