diff --git a/app/controllers/admin/event_news_controller.rb b/app/controllers/admin/event_news_controller.rb
index 37cb7c6..aed6f73 100644
--- a/app/controllers/admin/event_news_controller.rb
+++ b/app/controllers/admin/event_news_controller.rb
@@ -24,9 +24,7 @@ class Admin::EventNewsController < OrbitAdminController
   def update_sort_setting
     setting = @event_news_setting
     setting.update_attributes(settings_params)
-    if defined?(OrbitHelper::SharedHash) && OrbitHelper::SharedHash
-      OrbitHelper::SharedHash['event_news_mod'][:enable_manually_sort] = setting.enable_manually_sort
-    end
+    update_enable_manually_sort(setting)
     redirect_to edit_sort_admin_event_news_index_path
   end
   
@@ -198,6 +196,7 @@ class Admin::EventNewsController < OrbitAdminController
   def createsettings
     setting = EventNewsSetting.new(settings_params)
     setting.save
+    update_is_postdate_sort_first(setting)
     redirect_to admin_event_news_settings_path
   end
   
@@ -206,9 +205,10 @@ class Admin::EventNewsController < OrbitAdminController
     ids = params['event_news_setting']['anns_status_settings'].to_a.collect do |i,v|
       v['_id']
     end.compact
-    AnnsStatusSetting.where(:id.nin=>ids).destroy
+    EventNewsStatusSetting.where(:id.nin=>ids).destroy
     setting.update_attributes(settings_params)
     setting.save
+    update_is_postdate_sort_first(setting)
     redirect_to admin_event_news_settings_path
   end
 
@@ -575,4 +575,16 @@ class Admin::EventNewsController < OrbitAdminController
   def settings_params
     params.require(:event_news_setting).permit!
   end
+
+  def update_enable_manually_sort(setting)
+    if defined?(OrbitHelper::SharedHash) && OrbitHelper::SharedHash
+      OrbitHelper::SharedHash['event_news_mod'][:enable_manually_sort] = setting.enable_manually_sort
+    end
+  end
+
+  def update_is_postdate_sort_first(setting)
+    if defined?(OrbitHelper::SharedHash) && OrbitHelper::SharedHash
+      OrbitHelper::SharedHash['event_news_mod'][:is_postdate_sort_first] = setting.is_postdate_sort_first
+    end
+  end
 end
diff --git a/app/controllers/event_news_mods_controller.rb b/app/controllers/event_news_mods_controller.rb
index 4026953..b171081 100644
--- a/app/controllers/event_news_mods_controller.rb
+++ b/app/controllers/event_news_mods_controller.rb
@@ -3,17 +3,8 @@ class EventNewsModsController < ApplicationController
   def initialize
     super
     @app_title = 'event_news_mod'
-    @manually_sort = manually_sort
-    EventNews.instance_variable_set('@manually_sort',@manually_sort)
     #self.request = OrbitHelper.request
   end
-  def manually_sort
-    if defined?(OrbitHelper::SharedHash) && OrbitHelper::SharedHash
-      OrbitHelper::SharedHash['event_news_mod'][:enable_manually_sort] rescue EventNewsSetting.first.enable_manually_sort
-    else
-      EventNewsSetting.first.enable_manually_sort rescue false
-    end
-  end
   def index
     EventNews.remove_expired_status
     sorted,total_pages = get_sorted_event_news
diff --git a/app/helpers/event_news_helper.rb b/app/helpers/event_news_helper.rb
index 4ba42fc..5f4ef83 100644
--- a/app/helpers/event_news_helper.rb
+++ b/app/helpers/event_news_helper.rb
@@ -539,4 +539,18 @@ module EventNewsHelper
       </div>
     </div>").html_safe
   end
+  def self.enable_manually_sort
+    if defined?(OrbitHelper::SharedHash) && OrbitHelper::SharedHash
+      OrbitHelper::SharedHash['event_news_mod'][:enable_manually_sort]
+    else
+      EventNewsSetting.first.enable_manually_sort rescue false
+    end
+  end
+  def self.is_postdate_sort_first
+    if defined?(OrbitHelper::SharedHash) && OrbitHelper::SharedHash
+      OrbitHelper::SharedHash['event_news_mod'][:is_postdate_sort_first]
+    else
+      EventNewsSetting.first.is_postdate_sort_first rescue false
+    end
+  end
 end
diff --git a/app/models/event_news.rb b/app/models/event_news.rb
index 661abe8..02dd66c 100644
--- a/app/models/event_news.rb
+++ b/app/models/event_news.rb
@@ -106,9 +106,24 @@ class EventNews
   before_destroy :destroy_email
 
   scope :open_in_future, ->{where(:is_hidden.ne=>true,:is_preview.ne => true,:postdate.gt=>Time.now).order(postdate: :asc)}
-  scope :can_display_and_sorted, ->{where(:is_hidden.ne=>true,:is_preview.ne => true).valid_time_range.order(event_date: :desc)}
-  scope :can_display_and_sorted_according_today, ->{where(:is_hidden.ne=>true,:is_preview.ne => true).order(event_date: :asc).valid_time_range.where(:event_date.gte => Date.today.to_time)}
-  scope :valid_time_range, ->{and_any_of([{"postdate"=>{"$lte"=> Time.now}, "deadline"=>{"$gte"=> Time.now}}, {"postdate"=>{"$lte"=> Time.now}, "deadline"=>nil}]).order((@manually_sort ? {is_top: :desc,sort_number: :asc,postdate: :desc,id: :desc} : {is_top: :desc,postdate: :desc,id: :desc}))}
+  scope :can_display_and_sorted, ->{where(:is_hidden.ne=>true,:is_preview.ne => true).valid_time_range}
+  scope :can_display_and_sorted_according_today, ->{where(:is_hidden.ne=>true,:is_preview.ne => true).valid_time_range.where(:event_date.gte => Date.today.to_time)}
+  scope :valid_time_range, ->{
+    and_any_of([
+      {"postdate"=>{"$lte"=> Time.now}, "deadline"=>{"$gte"=> Time.now}},
+      {"postdate"=>{"$lte"=> Time.now}, "deadline"=>nil}
+    ])
+    .order(
+      (EventNewsHelper.enable_manually_sort ? 
+        {is_top: :desc, sort_number: :asc} :
+        {is_top: :desc}
+      ).merge(
+        EventNewsHelper.is_postdate_sort_first ? 
+        {postdate: :desc, event_date: :desc, id: :desc} :
+        {event_date: :desc, postdate: :desc, id: :desc}
+      )
+    )
+  }
   scope :is_approved, ->{where(:approved => true)}
   scope :is_approved_and_show, ->{where(:approved => true,:is_hidden.ne=>true,:is_preview.ne => true)}
   scope :filter_cats_and_tags, ->(cats,tags) {filter_by_widget_categories(cats,false).filter_by_tags(tags)}
diff --git a/app/models/event_news_setting.rb b/app/models/event_news_setting.rb
index 141fde7..403a806 100644
--- a/app/models/event_news_setting.rb
+++ b/app/models/event_news_setting.rb
@@ -12,6 +12,7 @@ class EventNewsSetting
 	field :including_time, type: Boolean, default: true
 	field :hour_clock_24, type: Boolean, default: true
 	field :enable_manually_sort, type: Boolean, default: false
+	field :is_postdate_sort_first, type: Boolean, default: false
 	has_many :event_news_status_settings, :autosave => true, :dependent => :destroy
 	accepts_nested_attributes_for :event_news_status_settings, :allow_destroy => true
 	
diff --git a/app/views/admin/event_news/_form.html.erb b/app/views/admin/event_news/_form.html.erb
index 5daf66a..271eee2 100644
--- a/app/views/admin/event_news/_form.html.erb
+++ b/app/views/admin/event_news/_form.html.erb
@@ -13,6 +13,9 @@
     cursor: default;
     display: inline-block;
   }
+  legend {
+    background: white;
+  }
 </style>
 <% content_for :page_specific_javascript do %>
   <%= javascript_include_tag "lib/bootstrap-fileupload" %>
diff --git a/app/views/admin/event_news/settings.html.erb b/app/views/admin/event_news/settings.html.erb
index 9dbc196..335cb96 100644
--- a/app/views/admin/event_news/settings.html.erb
+++ b/app/views/admin/event_news/settings.html.erb
@@ -79,6 +79,9 @@
   .td-delete{
     width: 10%;
   }
+  legend {
+    background: white;
+  }
 </style>
 <% 
   sub_managers = @module_app.sub_managers
@@ -166,6 +169,12 @@
         <%= f.check_box :is_display_edit_only %>
     </div>
   </div>
+  <div class="control-group">
+    <%= f.label :is_postdate_sort_first, t("event_news.is_postdate_sort_first"), :class => "control-label muted" %>
+    <div class="controls">
+        <%= f.check_box :is_postdate_sort_first %>
+    </div>
+  </div>
   <div class="control-group">
     <%= f.label :top_limit, t("event_news.top_limit"), :class => "control-label muted" %>
     <div class="controls">
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 914259e..2803e21 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -169,6 +169,7 @@ en:
     display_subtitle: Display Subtitle in Content Page
     display_img: Display Cover Image in Content Page
     is_display_edit_only: Only display editable event news
+    is_postdate_sort_first: Sort by Post Date first (Sort by Event Date first as Default)
     only_manager_can_edit_status: Only manager can edit status of event news
     layout_type: Layout type
     event_news_setting_for_iframe: Event News settings for iframe
diff --git a/config/locales/zh_tw.yml b/config/locales/zh_tw.yml
index a2a8fef..b39f361 100644
--- a/config/locales/zh_tw.yml
+++ b/config/locales/zh_tw.yml
@@ -172,6 +172,7 @@ zh_tw:
     display_subtitle: 內容頁顯示副標題
     display_img: 內容頁顯示封面圖片
     is_display_edit_only: 只顯示可更新的活動公告
+    is_postdate_sort_first: 優先使用公告日期排序(預設優先使用事件日期)
     only_manager_can_edit_status: 只有管理者可更新活動公告狀態
     layout_type: 頁面樣式
     event_news_setting_for_iframe: 活動公告iframe設定
diff --git a/event_news_mod.gemspec b/event_news_mod.gemspec
index e758175..50e4840 100644
--- a/event_news_mod.gemspec
+++ b/event_news_mod.gemspec
@@ -163,7 +163,7 @@ Gem::Specification.new do |s|
   s.license     = "MIT"
   s.metadata = {
     "_require" => "#{File.expand_path("../app/models/event_news_setting", __FILE__)}",
-    "global_hash" => "{enable_manually_sort: (EventNewsSetting.first.enable_manually_sort rescue false)}"
+    "global_hash" => "{enable_manually_sort: (EventNewsSetting.first.enable_manually_sort rescue false), is_postdate_sort_first: (EventNewsSetting.first.is_postdate_sort_first rescue false)}"
   }
 
   s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.rdoc"]