Today the biggest challenge of our aging society is to enable people with impairments to have a better quality of life maintaining their independence. The chapter explores how technology can support elderly and disabled people in their home. Firstly, a classification of Smart Home Systems in Safety systems, Environmental control systems, Energy-control-systems, Reminder systems, Medication Dispensing systems, Communication and Entertainment systems is presented. For each of these systems some examples of different technological solutions presented in the literature are described. Moreover, an analysis of social and economic impacts of the use of these technologies on the society is presented. Finally, some studies about the perception and acceptance of these technologies by user are given.