Taking　the　main　city　of　Fuzhou　as　the　study　area,　the　relationship　between　the　spatiotemporal　evolution　of　urban　green　space　(UGS)　and　the　urban　thermal　environment　from　1993　to　2013　was　investigated　using　a　set　of　remote　sensing　images.　The　evolution　of　UGS　is　obvious　in　the　study　area,　where　UGS　loss　(42.83　km2)　>　UGS　extension　(4.99　km2)　>　UGS　exchange　(2.61　km2).　UGS　loss　affects　forest/grass　>　water　>　wetland.　Furthermore,　the　area　defined　as　high　temperature　zones　increased　by　23.11　km2　in　2013,　twice　as　much　as　that　in　1993.　However,　the　influence　of　UGS　on　the　urban　thermal　environment　differs　by　type　and　evolution:　water　has　the　greatest　cooling　effect,　followed　by　wetland　and　forest/grass,　and　UGS　loss　(8.67　℃)　>　UGS　exchange　(4.00　℃)　>　UGS　extension　(2.90　℃)　>　UGS　unchanged　(2.45　℃).　Finally,　the　vegetation　and　cooling　index　classified　the　mechanism　of　temperature　response　induced　by　different　types　of　UGS　evolution.　The　evolution　of　UGS　loss　usually　simulated　the　movement　of　the　corresponding　pixel　from　the　low　land　surface　temperature　and　high　vegetation　coverage　to　the　opposite　situation.　Regression　analyses　demonstrated　that　the　effect　of　elevated　land　surface　temperature　generated　from　the　reduction　of　water　and　forest/grass　reached　0.81　℃　and　0.72　℃,　respectively,　in　20　years,　indicating　that　the　loss　of　a　significant　amount　of　UGS　during　urbanization　was　the　primary　influence　on　the　urban　thermal　environment.　This　study　may　provide　more　useful　information　for　researchers　and　decision-makers　engaged　in　urban　planning,　urban　regeneration,　and　sustainable　land　development,　especially　focusing　on　the　issues　of　climate　adaption　and　the　urban　heat　island　(UHI)　effect　mitigation.　©　2019　Elsevier　GmbH