diff --git a/lib/qiniu/rs.rb b/lib/qiniu/rs.rb
index 3b7323b..0c0f457 100755
--- a/lib/qiniu/rs.rb
+++ b/lib/qiniu/rs.rb
@@ -58,18 +58,6 @@ module Qiniu
         code == StatusOK
       end
 
-=begin
-      def set_watermark(customer_id, options = {})
-        code, data = EU.set_watermark(customer_id, options)
-        code == StatusOK
-      end
-
-      def get_watermark(customer_id = nil)
-        code, data = EU.get_watermark(customer_id)
-        code == StatusOK ? data : false
-      end
-=end
-
       def put_file opts = {}
         code, data = IO.put_file(opts[:file],
                                  opts[:bucket],
diff --git a/lib/qiniu/rs/eu.rb b/lib/qiniu/rs/eu.rb
deleted file mode 100755
index f684417..0000000
--- a/lib/qiniu/rs/eu.rb
+++ /dev/null
@@ -1,22 +0,0 @@
-# -*- encoding: utf-8 -*-
-
-module Qiniu
-  module RS
-    module EU
-      class << self
-        include Utils
-
-        def set_watermark(customer_id, options = {})
-          Auth.request Config.settings[:eu_host] + '/wmset', options.merge({:customer => customer_id})
-        end
-
-        def get_watermark(customer_id = nil)
-          post_data = customer_id.nil? ? nil : {:customer => customer_id}
-          Auth.request Config.settings[:eu_host] + '/wmget', post_data
-        end
-
-      end
-    end
-  end
-end
-
diff --git a/spec/qiniu/rs/eu_spec.rb b/spec/qiniu/rs/eu_spec.rb
deleted file mode 100755
index 5e5894a..0000000
--- a/spec/qiniu/rs/eu_spec.rb
+++ /dev/null
@@ -1,66 +0,0 @@
-# -*- encoding: utf-8 -*-
-
-require 'spec_helper'
-require 'qiniu/rs'
-require 'qiniu/rs/pub'
-require 'qiniu/rs/eu'
-
-module Qiniu
-  module RS
-    describe EU do
-
-      before :all do
-        @customer_id = "why404@gmail.com"
-        @bucket = 'RubySdkTest' + (Time.now.to_i+rand(1000)).to_s
-        @key = "image_logo_for_test.png"
-
-        result = Qiniu::RS.mkbucket(@bucket)
-        puts result.inspect
-        result.should be_true
-
-        local_file = File.expand_path('../' + @key, __FILE__)
-        upopts = {:scope => @bucket, :expires_in => 3600, :customer => @customer_id}
-        uptoken = Qiniu::RS.generate_upload_token(upopts)
-
-        data = Qiniu::RS.upload_file :uptoken => uptoken, :file => local_file, :bucket => @bucket, :key => @key
-        puts data.inspect
-
-        code2, data2 = Qiniu::RS::Pub.set_separator(@bucket, "-")
-        code2.should == 200
-        puts data2.inspect
-
-        code3, data3 = Qiniu::RS::Pub.set_style(@bucket, "small.jpg", "imageView/1/w/120/h/120/q/85/format/jpg/watermark/1")
-        code3.should == 200
-        puts data3.inspect
-      end
-
-      after :all do
-        result = Qiniu::RS.drop(@bucket)
-        puts result.inspect
-        result.should_not be_false
-      end
-
-=begin
-      context ".set_watermark" do
-        it "should works" do
-          options = {
-            :text => "Powered by QiniuRS"
-          }
-          code, data = Qiniu::RS::EU.set_watermark(@customer_id, options)
-          code.should == 200
-          puts data.inspect
-        end
-      end
-
-      context ".get_watermark" do
-        it "should works" do
-          code, data = Qiniu::RS::EU.get_watermark(@customer_id)
-          code.should == 200
-          puts data.inspect
-        end
-      end
-=end
-
-    end
-  end
-end
diff --git a/spec/qiniu/rs_spec.rb b/spec/qiniu/rs_spec.rb
index 8c0dd80..4665b12 100755
--- a/spec/qiniu/rs_spec.rb
+++ b/spec/qiniu/rs_spec.rb
@@ -95,27 +95,6 @@ module Qiniu
       end
     end
 
-=begin
-    context ".set_watermark" do
-      it "should works" do
-        options = {
-          :text => "Powered by QiniuRS"
-        }
-        result = Qiniu::RS.set_watermark(1, options)
-        result.should_not be_false
-        puts result.inspect
-      end
-    end
-
-    context ".get_watermark" do
-      it "should works" do
-        result = Qiniu::RS.get_watermark(1)
-        result.should_not be_false
-        puts result.inspect
-      end
-    end
-=end
-
     context ".upload_file" do
       it "should works" do
         uptoken_opts = {:scope => @bucket, :escape => 0}