The SMART-1 (Small Mission for Advanced Research in Technology) spacecraft has been launched on 27 Sept. 2003, as an Ariane-5 auxiliary passenger. Thanks to the successful electric propulsion navigation, the SMART-1 spacecraft reached lunar capture on 17 November 2004, and has spiraled down to reach on 15 March 2005 a lunar orbit 400-3000 km for a nominal science period of six months, with 1 year science extension. We shall give the overview of SMART-1 from launch, lunar capture, lunar science orbit from March 2005 to impact on 3 September 2006. Three instruments have been operating : the miniature high resolution multicolour camera AMIE for lunar geomorphology (resolution down to 40 m per pixel), SIR infrared spectrometer (0.9-2.5 microns down to 400 m FOV) for mineralogy, and D-CIXS X-ray spectrometer for elemental composition. We shall highlight SMART-1 science themes and results at the Moon, and perspectives for future lunar exploration.