Appeared　Marangoni　convection　during　absorption　in　absorber　affects　absorber　performance　significantly.　To　understand　mechanism　of　forming　Marangoni　convection　better,　shadowgraph　technique　is　used　to　visualize　absorption　process　to　find　conditions　for　generating　and　enhancing　Marangoni　convections.　Absorption　experiments　are　performed　in　a　transparent　static　pool　at　atmospheric　pressure.　Experimental　results　show　that　there　are　two　typical　situations　during　water　vapor　absorption,　i.e.　a　gradually　widen　black　horizontal　band　or　Marangoni　convection　appeared.　Marangoni　convections　can　be　observed　in　various　intensities　with　different　starting　time　and　duration　during　vapor　absorption　process　when　different　amount　of　n-octanol　is　added　in　LiBr　aqueous　solution.　After　several　minutes　of　vapor　absorption,　convection　disappears　and　a　horizontal　black　band　turns　up　in　shadow　image.　This　black　band　is　thought　as　a　water　vapor　absorption　layer　of　LiBr　aqueous　solution　at　interface.