Laser　fusion　welding-brazing　processes　are　methods　to　metallurgically　join　dissimilar　alloys　with　different　melting　points　by　laser　heating　to　melt　materials　(substrate　and　filler　material)　with　lower　melting　point,　and　by　the　interaction　between　the　weld　pool　and　the　solid　substrate　with　higher　melt　point　at　the　joint　interface.　Laser　fusion　welding-brazing　processes　of　dissimilar　alloys　are　classified　according　to　the　laser　energy　absorption　mechanisms.　The　development　and　state　of　the　art　of　laser　fusion　welding-brazing　processes　are　reviewed.