Mesoporous　silica　materials　have　been　synthesized　at　low　temperature　under　alkaline　condition　using　tetraethyl　orthosilicate　as　the　silica　source　and　cetyltrimethylammonium　bromide　as　the　structure　directing　agent.　And　the　ordered　mesoporous　carbon　was　synthesized　by　liquid　impregnation　method　with　sucrose　as　the　carbon　precursor　and　mesoporous　silica　as　template.　The　resulting　materials　were　characterized　by　X-ray　diffraction,　transmission　electron　microscopy　and　N(2)　adsorption-desorption.　The　results　show　that　the　mesoporous　materials　have　highly　ordered　structure,　high　specific　surface　area　(mesoporous　silica,　992　similar　to　1096　m(2)/g;　mesoporous　carbon,　930　similar　to　1208　m(2)/g),　large　pore　volume　and　narrow　pore　size　distribution.　In　addition,　with　the　rising　of　reaction　temperature,　the　phase　transformation　of　mesoporous　silica　from　hexagonal　p6mm　to　cubic　Ia3d　was　observed,　and　the　structure　of　mesoporous　carbon　replicated　from　silica　template　transformed　from　cubic　Ia3d　to　tetragonal　I4(1)/a.　The　preliminary　discussion　on　phase　transition　was　carried　on.