In　order　to　solve　the　semantic　object　extraction　problem　under　complex　background　in　video　retrieval,　semantic　object　extraction　method　based　on　combination　of　motion　features　and　visual　attention　is　presented.　First,　moving　object　is　extracted　using　motion　features;　then　static　object　that　has　important　semantic　characteristic　is　extracted　using　visual　attention;　finally,　a　complete　integration　method　proposed　to　combine　moving　semantic　object　and　static　semantic　object　in　the　above.　In　this　method,　we　take　full　advantages　of　motion　feature　of　moving　object　and　color　and　edge　feature　of　static　object.　Experimental　results　show　that　this　method　has　achieved　remarkable　results.　©2010　IEEE.