The　Moderate-resolution　Imaging　Spectroradiometer　(MODIS)　is　an　earth-imaging　instrument　now　onboard　both　the　Terra　and　Aqua　polar-orbiting　satellites.　MODIS　has　36　spectral　bands,　covering　the　spectral　range　from　412　nm　to　14　200　urn,　and　provides　spatial　images　with　0.25　km　(two　bands),　0.5　km　(five　bands)　and　I　km　(29　bands)　resolutions　at　nadir.　These　three　application　products　are　obtained　mainly　through　the　processing　on　level　1B　product　for　global　studies　of　the　Earth＇s　land,　oceans　and　atmosphere.　This　paper　provides　a　brief　description　of　the　MODIS　characteristics　and　MODIS　1B　saved　file　format-HDF,　and　describes　an　approach　for　extracting　the　data　for　the　purpose　of　high　level　product.　The　Vegetation　Indices　Product＇s　generation　methods　were　derived　as　the　example　at　the　end.