This book constitutes the refereed proceedings of the First European Conference on Ambient Intelligence, AmI 2007, held in Darmstadt, Germany, in November 2007.The 17 revised full papers presented together with 5 research reports were carefully reviewed and selected from 48 submissions. The papers are organized in topical sections on mobility and sensing, applications of AmI, activity and location sensing, AmI and artificial intelligence, AmI middleware and infrastructure, and interaction with the environment. The book is rounded off by a section on case studies and lessons learned, presenting a high level selection of current research reports and papers that reflect the most important activities of current ambient intelligence research.