diff --git a/app/controllers/admin/seminars_controller.rb b/app/controllers/admin/seminars_controller.rb
index b994219..096c632 100644
--- a/app/controllers/admin/seminars_controller.rb
+++ b/app/controllers/admin/seminars_controller.rb
@@ -113,7 +113,7 @@ class Admin::SeminarsController < OrbitAdminController
       @seminar_signup_admin_setting = SeminarSignupAdminSetting.create(:seminar_main_id=>"enquiry_for_applicants")
     end
     if params[:name].present?
-      @seminar_signups = SeminarSignup.where(:name => /#{params[:name]}/).page(params[:page]).per(10)
+      @seminar_signups = SeminarSignup.where(:name => /#{params[:name]}/).sort_ordered.page(params[:page]).per(10)
     else
       @seminar_signups = []
     end
@@ -126,7 +126,7 @@ class Admin::SeminarsController < OrbitAdminController
 
         ids2 = SeminarSignup.where(:seminar_main_id.in=> SeminarMain.where(:organizer_id=>current_user.member_profile_id).pluck(:id)).pluck(:id)
 
-        @seminar_signups = @seminar_signups.where(:id.in=>all_seminar_signup_ids + ids2).page(params[:page]).per(10)
+        @seminar_signups = @seminar_signups.where(:id.in=>all_seminar_signup_ids + ids2).sort_ordered.page(params[:page]).per(10)
       end
     end
   end
@@ -388,7 +388,11 @@ class Admin::SeminarsController < OrbitAdminController
   def seminar_signup
     @seminar_signups = []
     if params[:type] == "table"
-      @seminar_signups = @seminar.seminar_signups.where(:name=>/#{params[:search]}/)
+      if params[:search].to_i != 0
+        @seminar_signups = @seminar.seminar_signups.where(:serial_number=>params[:search].to_i)
+      else
+        @seminar_signups = @seminar.seminar_signups.where(:name=>/#{params[:search]}/)
+      end
     else
       @seminar_signups = SeminarSignup.where(:id.in => @seminar.unassigned_seminar_signup_ids, :name=>/#{params[:search]}/)
     end
@@ -405,7 +409,7 @@ class Admin::SeminarsController < OrbitAdminController
       @seminar_review = @seminar.seminar_reviews.where(:reviewer_id => current_user.member_profile_id.to_s).first
       @seminar_signups = @seminar.seminar_signups.where(:id.in=>@seminar_review.all_seminar_signup_ids)
     end
-    @seminar_signups = @seminar_signups.page(params[:page]).per(10)
+    @seminar_signups = @seminar_signups.sort_ordered.page(params[:page]).per(10)
     if request.xhr?
       render :layout => false
     end
diff --git a/app/controllers/seminars_controller.rb b/app/controllers/seminars_controller.rb
index 3143012..af34445 100644
--- a/app/controllers/seminars_controller.rb
+++ b/app/controllers/seminars_controller.rb
@@ -163,14 +163,15 @@ class SeminarsController < ApplicationController
           @seminar.unassigned_seminar_signup_ids <<  @seminar_signup.id.to_s
           @seminar.save
         end
+        extra_text = "<br>#{I18n.t('seminar_signup.serial_number')}: #{@seminar_signup.serial_number}"
         if params['seminar_signup']['status']=='C'
           status_param = '&status='
-          send_mail('submission',params[:seminar_signup][:email],params[:seminar_signup][:seminar_main_id])
+          send_mail('submission',params[:seminar_signup][:email],params[:seminar_signup][:seminar_main_id],extra_text)
         else
           status_param = ''
-          send_mail('signup',params[:seminar_signup][:email],params[:seminar_signup][:seminar_main_id])
+          send_mail('signup',params[:seminar_signup][:email],params[:seminar_signup][:seminar_main_id],extra_text)
         end
-        redirect_to "#{params[:referer_url]}/?method=signup_ok#{status_param}"
+        redirect_to "#{params[:referer_url]}/?method=signup_ok#{status_param}&serial_number=#{@seminar_signup.serial_number}"
       else
         if !@signup.blank?
          redirect_to "#{params[:referer_url]}", :notice => 'mail已存在'
@@ -185,6 +186,8 @@ class SeminarsController < ApplicationController
   end
 
   def signup_ok
+    params = OrbitHelper.params
+    {"serial_number"=> params[:serial_number]}
   end
 
   def add_file_proc
@@ -416,7 +419,7 @@ class SeminarsController < ApplicationController
   def seminar_signup_values_params
     params.require(:seminar_signup_values).permit!
   end
-  def send_mail(field_name,email,seminar_id)
+  def send_mail(field_name,email,seminar_id,extra_text="")
     email_set = @seminar.seminar_email_sets.select{|v| v.field_name == field_name}
     if email_set.length==0
       mail = Email.create(mail_to:[email],
@@ -424,14 +427,14 @@ class SeminarsController < ApplicationController
       template:"email/#{field_name}_email.html.erb",
       mail_sentdate:Time.current,
       mail_subject: t("seminar.email_#{field_name}_success"),
-      template_data:{'seminar_id'=>seminar_id,'locale'=>I18n.locale})
+      template_data:{'seminar_id'=>seminar_id,'locale'=>I18n.locale,'extra_text'=> extra_text})
     elsif !(email_set[0].disabled)
       mail = Email.create(mail_to:[email],
       module_app_key:"seminar",
       template:"email/#{field_name}_email.html.erb",
       mail_sentdate:Time.current,
       mail_subject: email_set[0].title[I18n.locale],
-      template_data:{'seminar_id'=>seminar_id,'locale'=>I18n.locale})
+      template_data:{'seminar_id'=>seminar_id,'locale'=>I18n.locale,'extra_text'=> extra_text})
     end
     begin
       mail.deliver
diff --git a/app/helpers/admin/seminars_helper.rb b/app/helpers/admin/seminars_helper.rb
index bf3c72e..15f3dfd 100644
--- a/app/helpers/admin/seminars_helper.rb
+++ b/app/helpers/admin/seminars_helper.rb
@@ -1,4 +1,7 @@
 module Admin::SeminarsHelper
+  def display_format_string(num, str_length)
+    return format("%0#{str_length}d", num % (10^str_length))
+  end
   def page_for_seminar(seminar)
     ann_page = nil
     pages = Page.where(:module=>'seminar')
diff --git a/app/models/seminar_main.rb b/app/models/seminar_main.rb
index cf7d3f2..b1488c6 100644
--- a/app/models/seminar_main.rb
+++ b/app/models/seminar_main.rb
@@ -39,6 +39,7 @@ class SeminarMain
   field :unassigned_seminar_signup_ids
   field :review_start_date, :type => Date
   field :review_end_date, :type => Date
+  field :last_serial_number, :type => Integer, :default => 0
   belongs_to :seminar_item
   belongs_to :organizer , :class_name=>"MemberProfile", :foreign_key => :organizer_id
   has_many :seminar_links, :autosave => true, :dependent => :destroy
@@ -139,6 +140,16 @@ class SeminarMain
         self.unassigned_seminar_signup_ids = self.seminar_signup_ids.map{|s| s.to_s}
         save_flag = true
       end
+      unless self.last_serial_number_changed_from_default?
+        self.seminar_signups.sort_ordered.each do |ss|
+          if ss.serial_number.nil?
+            self.last_serial_number += 1
+            ss.serial_number = self.last_serial_number
+            ss.save(:validate=>false)
+            save_flag = true
+          end
+        end
+      end
       self.save if save_flag
     end
   end
diff --git a/app/models/seminar_signup.rb b/app/models/seminar_signup.rb
index baa912e..fd91db6 100644
--- a/app/models/seminar_signup.rb
+++ b/app/models/seminar_signup.rb
@@ -14,6 +14,7 @@ class SeminarSignup
   field :address, localize: true
   field :password
   field :note, localize: true
+  field :serial_number
   
   belongs_to :seminar_main
 
@@ -22,9 +23,15 @@ class SeminarSignup
   
   accepts_nested_attributes_for :seminar_signup_values, allow_destroy: true
   accepts_nested_attributes_for :seminar_signup_contributes, allow_destroy: true
+  scope :sort_ordered, ->{ order_by(:created_at=>1) }
+
   before_create do
     unit = self.unit_translations.values.select{|v| v.present?}.first
     self.unit_translations = I18n.available_locales.map{|l| [l.to_s,unit]}.to_h
+    s = SeminarMain.find(self.seminar_main)
+    s.last_serial_number += 1
+    self.serial_number = s.last_serial_number
+  	s.save(:validate=>false)
   end
   after_destroy do
     seminar_main = self.seminar_main
@@ -42,5 +49,10 @@ class SeminarSignup
       seminar_main.save
     end
   end
-
+  def display_serial_number
+  	display_format_string(self.serial_number,4)
+  end
+  def display_format_string(num, str_length)
+    return format("%0#{str_length}d", num)
+  end
 end
diff --git a/app/views/admin/seminars/_get_display_fields.html.erb b/app/views/admin/seminars/_get_display_fields.html.erb
index 5114ca2..f66e307 100644
--- a/app/views/admin/seminars/_get_display_fields.html.erb
+++ b/app/views/admin/seminars/_get_display_fields.html.erb
@@ -1,6 +1,13 @@
 <% @field_names = [] %>
 <% @field_name_translations = [] %>
 <% default_hidden = [] %>
+<%
+    default_seminar_signup_fields = ["serial_number"]
+    default_seminar_signup_fields.each do |f|
+        @field_names << "seminar_signup.#{f}"
+        @field_name_translations << t("seminar_signup.#{f}")
+    end
+%>
 <% if @seminar.present? %>
     <% if @seminar.seminar_signup_field_sets.count != 0 %>
        <% @seminar.seminar_signup_field_sets.each do |field_set| %>
diff --git a/app/views/admin/seminars/_seminar_signup_dashboard.html.erb b/app/views/admin/seminars/_seminar_signup_dashboard.html.erb
index 2f97dee..8da13bd 100644
--- a/app/views/admin/seminars/_seminar_signup_dashboard.html.erb
+++ b/app/views/admin/seminars/_seminar_signup_dashboard.html.erb
@@ -17,7 +17,7 @@
     <div class="reviewer_block" data-id="<%=seminar_review.id.to_s%>" data-count="<%=count%>">
       <h5><%= MemberProfile.find(reviewer_id).name rescue "" %></h5>
       <span class="zoom_out_btn">-</span>
-      <% @seminar_signups = SeminarSignup.where(:id.in=>seminar_review.all_seminar_signup_ids) %>
+      <% @seminar_signups = SeminarSignup.where(:id.in=>seminar_review.all_seminar_signup_ids).sort_ordered %>
       <% @seminar_signups = @seminar_signups.page(params["page_no#{count}"]).per(5) %>
       <% @seminar_signups = @seminar_signups.page(0) if @seminar_signups.to_a.count == 0 %>
       <%= render :partial => "seminar_signup_render_table",:locals=>{:@seminar_signups=>@seminar_signups,:@drag => true,:@include_blank=>true,:@reviewer_id=>seminar_review.id.to_s} %>
@@ -43,6 +43,7 @@
 %>
 <div style="float: right;width: 50%;" data-count="<%=count+=1%>">
 <div id="main-table" style="overflow: scroll;">
+  <h5><%= t('seminar.submitter_without_reviewer') %></h5>
   <%= render :partial => "seminar_signup_render_table" %>
 </div>
 <%=
diff --git a/app/views/admin/seminars/_seminar_signup_render_table.html.erb b/app/views/admin/seminars/_seminar_signup_render_table.html.erb
index 7de0537..86051c5 100644
--- a/app/views/admin/seminars/_seminar_signup_render_table.html.erb
+++ b/app/views/admin/seminars/_seminar_signup_render_table.html.erb
@@ -87,6 +87,8 @@
                   <% end %>
                 <% elsif names[0] == "seminar_submission_fields" %>
                   <% val = seminar_signup.seminar_signup_contributes.collect{|s| (s.seminar_submission_values.where(:key=>names[1]).first.get_value_by_locale(I18n.locale) rescue "")} %>
+                <% elsif  names[0] == "seminar_signup" %>
+                  <% val = (seminar_signup.send("display_"+names[1]) rescue seminar_signup.send(names[1])) rescue nil %>
                 <% end %>
                 <% vals << val %>
             <% end %>
diff --git a/app/views/admin/seminars/export.xlsx.axlsx b/app/views/admin/seminars/export.xlsx.axlsx
index 38ba346..15b7269 100644
--- a/app/views/admin/seminars/export.xlsx.axlsx
+++ b/app/views/admin/seminars/export.xlsx.axlsx
@@ -6,6 +6,8 @@ wb.add_worksheet(name: (@seminar.title.to_s[0..27]+'...')) do |sheet|
 
   row = [t('seminar_signup.signup_time')]
 
+  row << t('seminar_signup.serial_number')
+
   row << t('seminar_signup.name')
   
   row << t('seminar_signup.unit')
@@ -35,10 +37,12 @@ wb.add_worksheet(name: (@seminar.title.to_s[0..27]+'...')) do |sheet|
   sheet.add_row row
 
   @seminar_signups.each do |signup|
-
+    types = {}
     row2 = []
 
     row2 << "#{signup.created_at} "
+    types[1] = :string
+    row2 << "#{signup.display_serial_number}"
     row2 << "#{signup[:name]} "
     row2 << "#{signup.unit} "
     row2 << "#{signup[:tel]} "
@@ -57,8 +61,8 @@ wb.add_worksheet(name: (@seminar.title.to_s[0..27]+'...')) do |sheet|
         row2 << nl2br(show_attribute_value(@seminar.get_attribute_value(rf,signup.id).get_value_by_locale(I18n.locale))) rescue ' '
       end
     end
-
-    sheet.add_row row2
+    types = (0...row2.count).map{|i| types[i]}
+    sheet.add_row row2 , :types => types
   end
  
 
diff --git a/app/views/admin/seminars/get_reviewer_block.html.erb b/app/views/admin/seminars/get_reviewer_block.html.erb
index 5400b54..9728091 100644
--- a/app/views/admin/seminars/get_reviewer_block.html.erb
+++ b/app/views/admin/seminars/get_reviewer_block.html.erb
@@ -3,7 +3,7 @@
     <div class="reviewer_block" data-id="<%=seminar_review.id.to_s%>">
       <h5><%= MemberProfile.find(@reviewer_id).name rescue "" %></h5>
       <span class="zoom_out_btn">-</span>
-      <% @seminar_signups = SeminarSignup.where(:id.in=>seminar_review.all_seminar_signup_ids) %>
+      <% @seminar_signups = SeminarSignup.where(:id.in=>seminar_review.all_seminar_signup_ids).sort_ordered %>
       <%= render :partial => "seminar_signup_render_table",:locals=>{:@seminar_signups=>@seminar_signups.page(params[:page]).per(5),:@drag => true,:@include_blank=>true,:@reviewer_id=>seminar_review.id.to_s} %>
       <%=
         content_tag :div, class: "bottomnav clearfix", style: "position: static;" do
diff --git a/app/views/email/signup_email.html.erb b/app/views/email/signup_email.html.erb
index eb6a9a0..a595543 100644
--- a/app/views/email/signup_email.html.erb
+++ b/app/views/email/signup_email.html.erb
@@ -5,4 +5,5 @@
 	<% end %>
 <% else %>
 	<%= t('seminar.email_signup_content') %>
-<% end %>
\ No newline at end of file
+<% end %>
+<%= (@data['extra_text'] rescue "").html_safe %>
\ No newline at end of file
diff --git a/app/views/email/submission_email.html.erb b/app/views/email/submission_email.html.erb
index d3b4041..d2b1665 100644
--- a/app/views/email/submission_email.html.erb
+++ b/app/views/email/submission_email.html.erb
@@ -5,4 +5,5 @@
 	<% end %>
 <% else %>
 	<%= t('seminar.email_submission_content') %>
-<% end %>
\ No newline at end of file
+<% end %>
+<%= (@data['extra_text'] rescue "").html_safe %>
\ No newline at end of file
diff --git a/app/views/seminars/con_upload.html.erb b/app/views/seminars/con_upload.html.erb
index d7e357b..a0f47a3 100644
--- a/app/views/seminars/con_upload.html.erb
+++ b/app/views/seminars/con_upload.html.erb
@@ -19,7 +19,7 @@
 <% if @seminar.contribute_start_date <= @time_now and ( @seminar.contribute_end_date.nil? or @seminar.contribute_end_date+1 >= @time_now ) %>
 	<% begin %>
 	<% if !session[:seminar_signup_id].blank? %>
-
+	<%=t('seminar_signup.serial_number') %>: <%=@seminar_signup.serial_number rescue ""%>
 	<a href="<%= OrbitHelper.url_to_show(@seminar.to_param) %>?method=con_logout&con_no=<%= @seminar.id %>" class='btn btn-primary'><%= t('seminar_signup.logout') %></a>
 
 	<table class="table table-hover table-striped seminar-index">
diff --git a/app/views/seminars/signup_ok.html.erb b/app/views/seminars/signup_ok.html.erb
index 0dcc17a..999558a 100644
--- a/app/views/seminars/signup_ok.html.erb
+++ b/app/views/seminars/signup_ok.html.erb
@@ -4,6 +4,8 @@
 %>
 
 <%= t('seminar_signup.success_message') %>
+<br>
+<%=t('seminar_signup.serial_number') %>: <%=data["serial_number"] rescue ""%>
 <% if !params['status'].nil? %>
 	<br>
 	<a href="<%= OrbitHelper.url_to_show(params[:slug]) %>?method=con_login"> 
diff --git a/config/locales/en.yml b/config/locales/en.yml
index c7e2b35..92f2cd0 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -19,6 +19,7 @@ en:
       verification_failed: Verification Failed #驗證碼錯誤
 
   seminar:
+    submitter_without_reviewer: Submitter without reviewer
     are_you_want_to_remove: "Are you really want to remove?"
     add_assign_fields: Add assign fields
     assign_fields: Assign fields
@@ -115,6 +116,7 @@ en:
     content: Content #內容
 
   seminar_signup:
+    serial_number: Sign-up No.
     status: Attendee Role
     title: File Name
     description: Summary
diff --git a/config/locales/zh_tw.yml b/config/locales/zh_tw.yml
index f2e812e..0f9aa1d 100644
--- a/config/locales/zh_tw.yml
+++ b/config/locales/zh_tw.yml
@@ -19,6 +19,7 @@ zh_tw:
       verification_failed: 驗證碼錯誤
 
   seminar:
+    submitter_without_reviewer: 未分派審查委員報名者
     are_you_want_to_remove: 你確定要刪除?
     add_assign_fields: 新增分派欄位
     assign_fields: 分派欄位
@@ -115,6 +116,7 @@ zh_tw:
     content: 內容
 
   seminar_signup:
+    serial_number: 註冊編號
     status: 報名身分
     title: 稿件名稱
     description: 摘要