diff --git a/fvm.sh b/fvm.sh
index 3139cc2..6dcf31b 100755
--- a/fvm.sh
+++ b/fvm.sh
@@ -2,9 +2,14 @@
 
 set -e
 
-OLD_PWD="$PWD"
 THIS_DIR="$(cd "$(if [[ "${0:0:1}" == "/" ]]; then echo "$(dirname $0)";else echo "$PWD/$(dirname $0)";fi)"; pwd)"
-cd ${OLD_PWD}
+FLUTTER_STORAGE_BASE_URL=${FLUTTER_STORAGE_BASE_URL:-"http://mirrors.cnnic.cn/flutter"}
+FLUTTER_RELEASE_BASE_URL="${FLUTTER_STORAGE_BASE_URL}/flutter_infra/releases"
+
+darwin=false
+case "`uname`" in
+    Darwin*) darwin=true;;
+esac
 
 function print_help(){
     echo "Flutter SDK versions Manager."
@@ -12,10 +17,11 @@ function print_help(){
     echo "Usage: fvm <command> [arguments]"
     echo ""
     echo "Available commands:"
-    echo "  list|ls     Print flutter-sdk installed versions."
-    echo "  use         Switch flutter-sdk to version."
-    echo "  install     Install flutter-sdk version."
-    echo "  help|*      Display help information."
+    echo "  use             Switch flutter-sdk to version."
+    echo "  list|ls         Print flutter-sdk installed versions."
+    echo "  list-remote     Print flutter-sdk release versions."
+    echo "  install         Install flutter-sdk version."
+    echo "  help|*          Display help information."
     echo ""
 
 }
@@ -29,6 +35,7 @@ function list(){
       echo "${version} => `cat ${THIS_DIR}/versions/${version}/version`"
     done
 }
+
 function current(){
    local current=`readlink $THIS_DIR/current`
    current=${current#$THIS_DIR/versions/}
@@ -57,10 +64,33 @@ function use(){
     ln -s $target_version_dir $current_dir
     print_current_version
 }
-
+function list_remote(){
+    local release_info_url="${FLUTTER_RELEASE_BASE_URL}/releases_linux.json"
+    if [[ darwin ]];then
+      release_info_url="${FLUTTER_RELEASE_BASE_URL}/releases_macos.json"
+    fi
+    curl -Ss ${release_info_url} | grep 'stable/' | awk -F ': ' '{print $2}' | awk -F '"' '{print $2}'
+}
 function install(){
-  echo "TODO: it is not implements.."
-  # https://mirrors.cnnic.cn/flutter/flutter_infra/releases/stable/macos/
+  local version_key="$1"
+  local version_zip=""
+  version_zip=`list_remote | grep "$version_key" | awk 'NR==1'`
+  if [[ -z ${version_zip}  ]];then
+    echo "Error: no flutter version match $version_key !!"
+    exit 1
+  fi
+  local version_short=`echo $version_zip | awk -F '_v' '{print $2}' | awk -F '.zip' '{print $1}'`
+  local download_url="${FLUTTER_RELEASE_BASE_URL}/${version_zip}"
+  local temp_path="${TMPDIR}/flutter.zip"
+  local target_dir="${THIS_DIR}/versions/${version_short}"
+  if [[ -d ${target_dir} ]];then
+    echo "Error: flutter $version_short seems to has installed ,please check it!!"
+    exit 1
+  fi
+  echo "flutter $version_short has downloading..."
+  curl --progress-bar -o $temp_path $download_url
+  unzip -o $temp_path -d $target_dir
+  echo "flutter $version_short has installed to $target_dir!"
 }
 
 function main(){
@@ -70,7 +100,8 @@ function main(){
     case ${cmd} in
         "use")use $args;;
         "list"|"ls")list;;
-        "install")install;;
+        "list-remote")list_remote;;
+        "install")install $args;;
         "help"|*)print_help;;
     esac
 }