Book excerpt: This book constitutes the refereed proceedings of the 8th International Conference on Ubiquitous Computing and Ambient Intelligence, UCAmI 2014, held in Belfast, UK, in December 2014. The 57 papers presented together with 7 papers of the workshop AmIUA 2014, 8 papers of the workshop IoT 2014, 7 papers of the workshop EUSPAI 2014, and 6 papers of the workshop VSS 2014 were carefully reviewed and selected from numerous submissions. The papers are grouped in topical sections on key application domains for ambient intelligence, human interaction in ambient intelligence, ICT instrumentation and middleware support for smart environments and objects, adding intelligence for environment adaption, and security and privacy issues in AAL.