diff --git a/app/scanner/dialog_clrcache.cpp b/app/scanner/dialog_clrcache.cpp
index bb315fbf..3de11d89 100644
--- a/app/scanner/dialog_clrcache.cpp
+++ b/app/scanner/dialog_clrcache.cpp
@@ -35,9 +35,8 @@ QString Dialog_ClrCache::getCachePath()
     HGBase_GetProcessName(procName, 512);
     strcat(cachePath, procName);
     strcat(cachePath, "/Cache/");
-    QString filePath = getStdFileName(StdStringToUtf8(cachePath).c_str());
 
-    return getCfgValue("save", "cachePath", QString(filePath));
+    return getCfgValue("save", "cachePath", getStdFileName(StdStringToUtf8(cachePath).c_str()));
 }
 
 void Dialog_ClrCache::on_btn_clr_clicked()
@@ -156,14 +155,14 @@ void Dialog_ClrCache::on_btn_directory_clicked()
 
 void Dialog_ClrCache::on_pbtn_ok_clicked()
 {
-    if (ui->lineEdit->text().endsWith(getStdFileName(QString("/Cache/")), Qt::CaseInsensitive))
+    if (ui->lineEdit->text().endsWith(getStdFileName(QString("Cache/")), Qt::CaseInsensitive))
     {
-        saveCfgValue("save", "cachePath", ui->lineEdit->text());
+        saveCfgValue("save", "cachePath", getStdFileName(ui->lineEdit->text()));
     }
     else
     {
-        QString filePath = ui->lineEdit->text() + "/Cache/";
-        HGResult ret = HGBase_CreateDir(filePath.toStdString().c_str());
+        QString filePath = ui->lineEdit->text() + "Cache/";
+        HGResult ret = HGBase_CreateDir(getStdString(filePath).c_str());
         if (ret != HGBASE_ERR_OK)
         {
             QString str = m_mainWindow->getLogInfo(ret);
diff --git a/app/scanner/mainwindow.cpp b/app/scanner/mainwindow.cpp
index 5fd3234a..36136168 100644
--- a/app/scanner/mainwindow.cpp
+++ b/app/scanner/mainwindow.cpp
@@ -1258,11 +1258,6 @@ void MainWindow::on_continueScan()
         return;
     }
 
-    if (!startSpaceCheck(m_dialogLog))
-    {
-        return;
-    }
-
     startSaveMessageBox(m_dialogLog);
 
     SANE_Status ret;
@@ -1676,39 +1671,6 @@ askIfClear MainWindow::startScanMessageBox(QWidget *parent)
     return notClearAndScan;
 }
 
-bool MainWindow::startSpaceCheck(QWidget* parent)
-{
-    qint64 space = 0;
-
-    QList<QStorageInfo> storageInfoList = QStorageInfo::mountedVolumes();
-    foreach(QStorageInfo storage, storageInfoList)
-    {
-        QString savePath;
-        if (1 == m_scanType)
-            savePath = Dialog_ClrCache::getCachePath();
-        else if (2 == m_scanType)
-            savePath = m_aquireIntoSaveParam.m_savePath;
-        if (0 == savePath.indexOf(getStdFileName(storage.rootPath())))
-        {
-            space = storage.bytesAvailable() / 1024 / 1024;
-            break;
-        }
-    }
-
-    assert(0 != space);
-    if (space < 64)
-    {
-        HGBase_WriteInfo(HGBASE_INFOTYPE_ERROR, "disk space is unsufficient!");
-        QMessageBox msg(QMessageBox::Information, tr("Information"),
-            tr("Insufficient disk space"), QMessageBox::Yes, parent);
-        msg.setButtonText(QMessageBox::Yes, tr("yes"));
-        msg.exec();
-        return false;
-    }
-
-    return true;
-}
-
 QString MainWindow::passwordEncrypt(const QString& password)
 {
     QString p = password;
@@ -3150,12 +3112,6 @@ void MainWindow::on_act_acquire_triggered()
     m_scanType = 1;
     m_scanInsertPos = -1;
 
-    if (!startSpaceCheck(this))
-    {
-        m_dialogLog->updateStatus(dev_que_.is_online() && 0 != m_scanType, m_isScanning);
-        return;
-    }
-
     startSaveMessageBox(this);
 
     m_dpi = getDpi();
@@ -3223,12 +3179,6 @@ void MainWindow::on_act_acquireSingle_triggered()
     m_scanType = 1;
     m_scanInsertPos = -1;
 
-    if (!startSpaceCheck(this))
-    {
-        m_dialogLog->updateStatus(dev_que_.is_online() && 0 != m_scanType, m_isScanning);
-        return;
-    }
-
     startSaveMessageBox(this);
 
     m_dpi = getDpi();
@@ -3312,12 +3262,6 @@ void MainWindow::on_act_acquireInto_triggered()
             return;
         }
 
-        if (!startSpaceCheck(this))
-        {
-            m_dialogLog->updateStatus(dev_que_.is_online() && 0 != m_scanType, m_isScanning);
-            return;
-        }
-
         startSaveMessageBox(this);
 
         m_dpi = getDpi();
@@ -3400,12 +3344,6 @@ void MainWindow::on_act_insertFromScanner_triggered()
             break;
         }
 
-        if (!startSpaceCheck(this))
-        {
-            m_dialogLog->updateStatus(dev_que_.is_online() && 0 != m_scanType, m_isScanning);
-            return;
-        }
-
         startSaveMessageBox(this);
 
         m_dpi = getDpi();
diff --git a/app/scanner/mainwindow.h b/app/scanner/mainwindow.h
index e1908110..fef5d445 100644
--- a/app/scanner/mainwindow.h
+++ b/app/scanner/mainwindow.h
@@ -256,7 +256,6 @@ private:
     void updateActionStatus();
     void startSaveMessageBox(QWidget* parent);
     askIfClear startScanMessageBox(QWidget* parent);
-    bool startSpaceCheck(QWidget* parent);
     QString passwordEncrypt(const QString& password);
     QString passwordDecrypt(const QString& transcode);
     bool open_scanner(const QString& name, const QString& scheme);