Taking　the　urban　green　space　(UCS)　in　the　main　urban　area　of　Fuzhou　as　the　research　object,　the　relationship　between　the　UCS　evolution　and　the　change　of　land　surface　thermal　environment　was　obtained　based　on　the　remote　sensing　inversion　of　land　surface　temperature　(LST)　and　the　extraction　of　land　use　and　land　cover　(LULC)　.　The　results　showed　that;　(1)　From　1993　to　2016,　the　area　of　UCS　Loss　and　UCS　Expansion　were　46.50km²　and　4.73km²　respectively,　with　the　area　difference　as　high　as　41.77km　.　The　land　surface　temperature　difference　(ΔLST)　caused　by　the　UCS　Loss　was　the　largest,　while　the　ΔLST　caused　by　the　other　three　evolution　types　was　slightly　lower　than　the　average　ΔLST.　(2)　There　was　a　trend　that　the　urban　cold　island　(UCI)　decreased　sharply　and　an　opposite　trend　of　the　urban　heat　island　(UHI)　in　23　years.　The　distribution　of　the　LULC　in　temperature　grades　was　obviously　different.　The　low　temperature　zone　was　distributed　with　more　wetlands　and　waters.　The　sub-low　temperature　zone　was　given　priority　to　forest/grass,　while　the　UHI　area　was　more　distributed　with　the　construction　land　and　bare　land.　(3)　The　space　gravity　method　illuminated　that　there　was　a　close　relationship　between　the　UHI　and　the　urban　center　of　gravity,　which　was　negative　correlation　with　UCS　location.　The　UCI　was　the　contrary　in　the　case.　(4)　The　cooling　effect　caused　by　different　types　of　UCS　evolution　was　quantified　which　was　in　order　as:　UCS　Expansion　＞　UCS　Unchanged　＞　UCS　Exchanged　＞　UCS　Loss.　The　calculation　showed　that　the　average　cooling　effect　of　UCS　Expansion　was　about　5.0　°C,　while　the　warming　effect　of　UCS　Loss　was　about　7.0　°C　.　Increasing　the　same　area　of　UCS　cannot　offset　the　warming　effect　caused　by　the　UCS　loss　previously　during　different　evolution　process.　Therefore,　the　scientific　and　rational　UCS　planning　is　very　important　to　relieve　UHI　effect.　©　2020　Science　Press.　All　rights　reserved.