This　paper　presents　a　complete　system　for　electronic　panoramic　mirror　based　on　image　mosaic.　In　recent　years,　there　has　been　growing　interest　in　using　image　mosaic.　We　propose　a　system　based　on　image　mosaic,　which　obtains　the　scenes　of　all　directions　at　one　time　compared　to　the　traditional　panoramic　mirror.　The　key　progress　is　image　registration.　The　Scale　Invariant　Feature　Transform　(SIFT)　algorithm　is　used　to　get　the　best　registration　results　with　respect　to　other　methods.　In　order　to　generate　the　panorama　in　real-time,　we　optimize　and　improve　the　algorithm.　The　experimental　results　show　that　the　system　is　useful　and　the　algorithm　is　stable　and　efficient.　©2010　IEEE.