Our　country　is　a　country　which　has　more　flooding　disasters.　The　affected　area　is　broad,　the　affected　time　is　long,　and　the　loss　is　grave.　Flood　and　disasters　control　will　be　a　long-term　and　difficult　assignment.　The　research　on　flood　and　disasters　control　needs　bring　in　advanced　scientific　technology　means　urgently.　It　is　necessary　to　improve　the　flood　and　disasters　control　work　through　the　high　and　new　technology.　At　present,　the　remote　sensing　technique,　geographic　information　system　and　global　positioning　system　(3S)　have　got　rapid　development.　The　spatial　information　technology　with　the　framework　of　3S　has　been　used　widely　in　the　flood　and　disasters　control　field.　This　article　mainly　focuses　on　the　function　of　spatial　information　technology,　and　forecasts　the　application　trend　of　spatial　information　technology　in　modern　flood　and　disasters　control.　©　2010　IEEE.