Land-Use/Land-Cover　(LU/LC)　change　detection　using　satellite　data　has　gained　momentum　with　the　advance　of　the　pre-operational　phase　of　regional　and　global　earth　observation　programmes　such　as　GEOS,　GMES,　and　GOFC-GOLD　to　name　but　a　few.　Present　study　aims　at　revealing　LU/LC　change　of　Bistrishko　branishte　biosphere　reserve　using　Landsat　5　TM　and　Landsat　7　ETM+　radiometer　satellite　data.　The　LU/LC　classification　of　the　study　area　is　done　for　the　period　2007-2012,　and　difference　images,　between　LU/LC　maps,　have　been　created.　The　classification　scheme　follows　CORINE2000　Level　3　with　few　additional　classes　introduced　to　map　changes.　The　methods　used　in　the　study　are　geoinformation,　cartography,　and　statistical.　The　results　show　that　in　effect　of　2012　wildfire　0.72　km(2)　from　reserve　territory　was　devastated.　The　temporal　changes　which　are　taking　place　after　the　60　ha　windthrow　in　2001,　the　200　ha　bark-beetle　outbreak　in　2003-2011　and　the　wildfire　from　June　2012　were　further　investigated　using　ASD　HH　FS　spectrometer　in　2011.　As　a　result　the　increase　in　＇331　Broad-leaved　forest＇　and　＇312　Coniferous　forest＇　LU/LC　classes　is　attributed　to　the　increase　of　the　territory　of　deciduous　species　after　a　large　bark　beetle　outbreak,　which　took　place　between　2003　and　2011,　which　devastated　most　of　the　old　Picea　abies　trees,　while　the　decrease　of　＇Outbreak＇　and　＇332　Bare　rock＇　LU/LC　classes　is　mainly　due　to　the　wildfire　which　took　place　in　June　2012.