Fuzhou　located　in　the　east　of　Fujian　province　is　one　of　the　areas　holding　the　most　abundant　wetland　resources　in　Fujian　province,　which　has　a　large　number　of　coastal　wetlands.　The　coastal　wetland　ecosystems　provides　habitat　and　nursery　areas　for　many　commercially　important　fish　and　crustaceans.　They　also　play　important　roles　in　shoreline　protection,　chemical　buffering,　water　quality　maintenance,　recreation　and　education,　and　as　reservoirs　of　genetic　materials.　During　the　past　decades,　the　distribution　and　amount　of　coastal　wetlands　have　been　changed　due　to　human　activities,　urbanization　development,　and　other　economic　issues　imposed　on　it,　which　brought　on　a　series　of　serious　damage　to　wetland　resources.　Thus,　there　is　an　increasing　need　to　master　the　distribution　and　dynamic　change　of　coastal　wetlands,　which　is　important　to　protection,　rational　development　and　utilization　of　the　coastal　wetlands　in　Fuzhou.　It　will　play　a　promational　role　on　wetland　resources　investigation,　long-term　monitoring　and　scientific　management　for　the　province　and　even　the　national　in　the　future,　and　has　a　strong　practical　value　and　broad　application　prospects.　In　this　study,　in　order　to　monitor　the　change　of　the　distribution　and　amount　of　the　coastal　wetlands　in　Fuzhou,　Landsat　7　ETM+　image　in　2000　and　ALOS　image　in　2009　were　used　to　classify　the　coastal　wetland　resources　in　Fuzhou.　In　the　classification　procedure　involved,　the　images　in　2000　and　2009　were　classified　into　9　land　use　types,　including　aquatic　farm,　mudflat,　paddy　field,　river,　shallow　water,　sandy　beach,　mudflat,　marshy　meadow,　reservoir　pond　and　non-wetland,　using　the　conventional　unsupervised　Maximum　Likelihood　Classification　Algorithm.　To　improve　information　extraction　accuracy　from　the　coastal　wetlands,　the　crude　results　of　unsupervised　classification　were　refined　and　optimized.　Then　the　distribution　and　the　spatio-temporal　changes　of　the　coastal　wetlands　were　analyzed　and　compared　using　GIS　analysis　function.　The　results　showed　that　natural　wetlands　in　the　east　coast　of　Fuzhou　had　reduced　while　artificial　wetlands　have　increased　significantly　in　the　past　10　years.　Aquatic　farm　had　the　largest　change　with　its　area　increasing　about　2　699.82　ha,　which　were　mainly　transformed　from　non-wetland　types,　mudflats　and　paddy　fields.　The　transformation　of　paddy　fields　were　mainly　changed　from　non-wetlands,　of　which　the　overall　area　increased　by　2　484.21　ha.　As　for　aquatic　farm,　river,　shallow　water,　sandy　beach　and　mudflat,　they　all　had　a　certain　scale　of　areas　that　had　been　converted　to　construction　lands.　The　changes　of　coastal　wetlands　were　primarily　caused　by　the　increasingly　large　areas　of　aquaculture　and　the　development　of　agriculture　and　urban　construction.