diff --git a/saoriaddaccountdialog.cpp b/saoriaddaccountdialog.cpp
index 828f04a..76e6aa2 100644
--- a/saoriaddaccountdialog.cpp
+++ b/saoriaddaccountdialog.cpp
@@ -49,7 +49,7 @@
     ui->getAccessToken_pushButton->setEnabled(false);
     ui->authorizeCode_lineEdit->setEnabled(false);
     connect(ui->instanceUrl_comboBox,&QComboBox::editTextChanged,[this](QString) {
-        m_instance = SaoriApplication::findInstance(ui->instanceUrl_comboBox->currentText());
+        m_instance = SaoriApplication::findInstance(QUrl(ui->instanceUrl_comboBox->currentText()));
         if (m_instance != nullptr) ui->openWebBrowser_pushButton->setEnabled(true);
         else ui->openWebBrowser_pushButton->setEnabled(false);
     });
@@ -110,3 +110,21 @@
     return;
 
 }
+
+void SaoriAddAccountDialog::on_check_pushButton_clicked()
+{
+    if (SaoriApplication::findInstance(QUrl(ui->instanceUrl_comboBox->currentText())) == nullptr) {
+        auto instance = new Saoridon(QUrl(ui->instanceUrl_comboBox->currentText()),this);
+        connect(instance,&Saoridon::instanceInfomationChanged,this,[=](){
+            if (!instance->instanceInfo("uri").isEmpty()) {
+                instance->clientRedistration();
+                if (!instance->clientSecret().isEmpty()) {
+                    instance->setParent(SaoriApplication::saori());
+                    SaoriApplication::getInstanceList()->append(instance);
+                    ui->instanceUrl_comboBox->addItem(instance->instance().toString());
+                    ui->instanceUrl_comboBox->setEditText(instance->instance().toString());
+                }
+            }
+        });
+    }
+}
diff --git a/saoriaddaccountdialog.h b/saoriaddaccountdialog.h
index ad5c13c..a94021e 100644
--- a/saoriaddaccountdialog.h
+++ b/saoriaddaccountdialog.h
@@ -52,6 +52,8 @@
 
     void on_getAccessToken_pushButton_clicked();
 
+    void on_check_pushButton_clicked();
+
 private:
     Ui::SaoriAddAccountDialog *ui;
 };
diff --git a/saoriaddaccountdialog.ui b/saoriaddaccountdialog.ui
index 11d3d82..6647133 100644
--- a/saoriaddaccountdialog.ui
+++ b/saoriaddaccountdialog.ui
@@ -66,7 +66,7 @@
       </widget>
      </item>
      <item row="2" column="3">
-      <widget class="QPushButton" name="pushButton">
+      <widget class="QPushButton" name="check_pushButton">
        <property name="text">
         <string>Check</string>
        </property>