Even　though　the　control　of　the　fan-coil　system　has　been　widely　investigated,　most　of　them　only　focus　on　the　effect　of　room　temperature　control　but　ignore　the　effect　of　humidity　control.　However,　both　temperature　and　humidity　are　important　to　thermal　comfort.　The　fan-coil　is　only　based　on　temperature　conditions　to　control　the　on/off　of　the　water　valve　and　the　speed　of　the　fan,　and　the　indoor　thermal　comfort　is　difficult　to　meet　the　needs　of　the　human　body.　In　response　to　this　problem,　a　simulation　tool　based　on　the　calculation　of　the　temperature　and　humidity　of　the　fan-coil　room　was　established　in　this　work.　It　could　realize　the　short-step　dynamic　calculation　of　both　room　temperature　and　humidity　with　different　enclosure　structures,　internal　disturbances,　and　outdoor　meteorological　conditions.　In　order　to　study　the　control　effect　of　the　fan-coil　on　the　room　temperature　and　humidity　after　the　equipment　was　selected,　examples　of　different　climate　zones　were　set　up　in　the　simulation.　The　simulation　results　showed　that　the　temperature　control　strategy　could　meet　the　indoor　temperature　and　humidity　control　requirements　under　most　operating　conditions.　However,　with　outdoor　low　temperature　and　high　humidity　conditions,　the　indoor　temperature　was　too　low　to　reach　the　setting　value　of　the　water　valve　opening,　and　the　humidity　cannot　be　controlled　by　the　fan　coil.　In　addition,　the　temperature　and　humidity　control　effects　of　the　constant　fan　speed　and　the　variable　fan　speed　control　strategies　were　also　compared.　The　results　showed　that　the　variable　fan　speed　control　strategy　can　better　control　indoor　temperature　and　humidity.　However,　when　the　humidity　ratio　of　air　is　too　much,　the　temperature　will　be　within　a　reasonable　range　but　the　humidity　will　exceed　the　standard.　©　2023,　The　Author(s),　under　exclusive　license　to　Springer　Nature　Singapore　Pte　Ltd.