diff --git a/models/user.js b/models/user.js
index 5ddc670..5704fc8 100644
--- a/models/user.js
+++ b/models/user.js
@@ -37,6 +37,7 @@ let model = db.define('user', {
 
   is_admin: { type: Sequelize.BOOLEAN },
   is_show: { type: Sequelize.BOOLEAN },
+  public_email: { type: Sequelize.BOOLEAN },
 
   sex: { type: Sequelize.INTEGER }
 }, {
diff --git a/modules/api.js b/modules/api.js
index fb5c04c..92714d3 100644
--- a/modules/api.js
+++ b/modules/api.js
@@ -94,7 +94,8 @@ app.post('/api/sign_up', async (req, res) => {
       user = await User.create({
         username: req.body.username,
         password: req.body.password,
-        email: req.body.email
+        email: req.body.email,
+        public_email: true
       });
       await user.save();
 
@@ -134,7 +135,8 @@ app.get('/api/sign_up/:token', async (req, res) => {
     user = await User.create({
       username: obj.username,
       password: obj.password,
-      email: obj.email
+      email: obj.email,
+      public_email: true
     });
     await user.save();
 
diff --git a/modules/user.js b/modules/user.js
index ed6767a..45e1a17 100644
--- a/modules/user.js
+++ b/modules/user.js
@@ -94,6 +94,7 @@ app.get('/user/:id', async (req, res) => {
 
     let statistics = await user.getStatistics();
     await user.renderInformation();
+    user.emailVisible = user.public_email || user.allowedEdit;
 
     res.render('user', {
       show_user: user,
@@ -168,6 +169,7 @@ app.post('/user/:id/edit', async (req, res) => {
 
     user.information = req.body.information;
     user.sex = req.body.sex;
+    user.public_email = (req.body.public_email === 'on');
 
     await user.save();
 
diff --git a/views/user.ejs b/views/user.ejs
index 3acf9f1..2f98d26 100644
--- a/views/user.ejs
+++ b/views/user.ejs
@@ -49,12 +49,14 @@
                                            <div class="ui bottom attached segment"><%= show_user.username %><% if (show_user.nameplate) { %><%- show_user.nameplate %><% } %></div>
                                         </div>
                                     </div>
-                                    <div class="row">
-                                        <div class="column">
-                                            <h4 class="ui top attached block header">Email</h4>
-                                            <div class="ui bottom attached segment" class="font-content"><%= show_user.email %></div>
-                                        </div>
-                                    </div>
+                                    <% if (show_user.emailVisible) { %>
+                                      <div class="row">
+                                          <div class="column">
+                                              <h4 class="ui top attached block header">Email</h4>
+                                              <div class="ui bottom attached segment" class="font-content"><%= show_user.email %></div>
+                                          </div>
+                                      </div>
+                                    <% } %>
                                     <div class="row">
                                         <div class="column">
                                             <h4 class="ui top attached block header">个性签名</h4>
diff --git a/views/user_edit.ejs b/views/user_edit.ejs
index 379b7ba..94b09fa 100644
--- a/views/user_edit.ejs
+++ b/views/user_edit.ejs
@@ -25,6 +25,13 @@
 	    	<label for="email">Email</label>
 	    	<input class="font-content" type="email" id="email" name="email" value="<%= edited_user.email %>"<% if (!user.allowedManage) { %> readonly<% } %>>
 	    </div>
+      <div class="inline field">
+        <label class="ui header">公开 Email</label>
+        <div class="ui toggle checkbox">
+          <input id="public_email" name="public_email" type="checkbox" <% if (edited_user.public_email) { %> checked<% } %>>
+          <label>　</label>
+        </div>
+	    </div>
 	    <div class="field">
 	    	<label for="information">个性签名</label>
 	    	<textarea class="font-content" rows="5" id="information" name="information"><%= edited_user.information %></textarea>