The　fully　coupled　online　air　quality　model　WRF/chem　was　used　to　investigate　the　aerosol-radiation　interaction　and　aerosol-cloud　interaction　on　the　regional　meteorological　factors　over　China　in　2006.　The　aerosol-radiation　interaction　and　aerosol-cloud　interaction　of　aerosols　influence　the　various　regional　meteorological　factors　in　the　worst　aerosol-polluted　regions　of　China.　Domain-wide　monthly-mean　over　all　day　and　night　hours　incoming　solar　radiation　decreased　by　-11.03　W/m(2),　-9.84　W/m(2),　-5.84　W/m(2)　and　-12.37　W/m(2);　temperature　at　2　meters　(T2)　decreased　by　-0.22　degrees　C,　-0.12　degrees　C,　-0.06　degrees　C　and　-0.24　degrees　C;　Planetary　boundary　layer　(PBL)　height　decreased　by　-16.44　m,　-15.90　m,　-5.48　m　and　-31.59　m　in　January,　April,　July　and　October,　respectively.　The　values　of　the　monthly-mean　incoming　solar　radiation,　T2　and　PBL　height　had　greater　decreases　in　east　China.　Due　to　aerosol　feedbacks,　a　slight　increase　of　the　monthly-mean　precipitation　occurred　in　southern　and　south-eastern　China.　The　aerosol-radiation　interaction　and　aerosol-cloud　interaction　of　aerosols　were　compared　for　the　United　States　(U.S.)　continent,　Europe,　India　and　this　study.　Due　to　the　higher　aerosol　load　in　China,　the　monthly-mean　incoming　solar　radiation,　T2　and　PBL　height　exhibited　greater　decreases　in　China　than　in　the　U.S.　continent　and　in　Europe.　Aerosol　extinction　was　the　dominant　effect　on　the　incoming　solar　radiation　for　either　cloudless　or　cloudy　weather　conditions　in　China,　but　aerosol　extinction　was　only　apparent　during　cloudless　weather　in　Europe.　In　India,　the　incoming　solar　radiation　decreased　by　-20　W/m(2)　or　more　in　the　most　aerosol　polluted　area,　which　is　close　to　the　value　of　decrease　determined　in　China.