Digital　Elevation　Models　(DEM)　data　(90mx90m)　reflected　by　the　NASA　Shuttle　Radar　Topography　Mission　(SRTM)　are　used　as　basic　information　source　to　overlay　digital　slope　models　and　digital　aspect　models,　which　are　applicable　to　the　mountainous　terrain　of　astronomical　solar　radiation　distributed　model.　This　paper　uses　ray-tracing　method　and　integral　by　subparagraph　to　calculate　the　conditions　of　terrain　shading　information,　and　through　an　integral　way　to　make　a　visualization　of　monthly　astronomical　solar　radiation　(ASR).　The　result　shows　that　the　geographical　and　topographical　factors　do　visible　effect　to　the　spatial　distribution　of　astronomical　solar　radiation　over　Wuyishan　area,　especially　in　January,　it　does　the　most　obvious　effect　to　terrain　shading,　while　in　July　it　does　the　lightest　effect　to　terrain　shading.　This　method　can　accurately　reflect　regional　differences　of　solar　radiation,　and　through　accumulating　daily　solar　radiation　in　the　region,　we　can　obtain　the　total　amount　of　solar　radiation　in　every　month　of　the　year.　This　result　can　provide　prerequisite　conditions　as　an　important　reference　and　then　be　useful　to　biomass　estimating　of　vegetation,　agricultural　production,　climatic　resources　development　and　exploiture.　©　2008　SPIE.