diff --git a/EvernoteToNotionChrome/App.xaml.cs b/EvernoteToNotionChrome/App.xaml.cs
index d0056c9..67e45f2 100644
--- a/EvernoteToNotionChrome/App.xaml.cs
+++ b/EvernoteToNotionChrome/App.xaml.cs
@@ -1,5 +1,6 @@
 using CefSharp;
 using CefSharp.Wpf;
+using EvernoteToNotionChrome.Service;
 using System;
 using System.Collections.Generic;
 using System.Configuration;
@@ -25,6 +26,9 @@ public partial class App : Application
             //Add Custom assembly resolver
             AppDomain.CurrentDomain.AssemblyResolve += Resolver;
 
+            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
+            DispatcherUnhandledException += Current_DispatcherUnhandledException;
+
             //Any CefSharp references have to be in another method with NonInlining
             // attribute so the assembly rolver has time to do it's thing.
             InitializeCefSharp();
@@ -100,6 +104,16 @@ private static Assembly Resolver(object sender, ResolveEventArgs args)
 
 
 
+        private void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
+        {
+            Exception ex = (Exception)e.ExceptionObject;
+            EasyLogManager.Logger.Error("Error#1 " + ex?.Message + Environment.NewLine + ex?.InnerException?.ToString());
+        }
 
+        private void Current_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
+        {
+            EasyLogManager.Logger.Error("Error#2 " + e?.Exception?.Message + Environment.NewLine + e?.Exception?.InnerException?.ToString());
+            e.Handled = true;
+        }
     }
 }
diff --git a/EvernoteToNotionChrome/Service/EasyLogManager.cs b/EvernoteToNotionChrome/Service/EasyLogManager.cs
new file mode 100644
index 0000000..891ba87
--- /dev/null
+++ b/EvernoteToNotionChrome/Service/EasyLogManager.cs
@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Threading;
+using System.IO;
+using System.Diagnostics;
+using EvernoteToNotionChrome.Utils;
+
+namespace EvernoteToNotionChrome.Service
+{
+    public class EasyLogManager
+    {
+        private static string _logFilename = System.Reflection.Assembly.GetExecutingAssembly().GetName().Name + ".log";
+
+        public static SimpleLogger Logger { set; get; }
+
+        /// <summary>
+        /// 如果日志大于10M则清除
+        /// </summary>
+        static EasyLogManager ()
+        {
+            if (File.Exists(_logFilename))
+            {
+                FileInfo finfo = new FileInfo(_logFilename);
+                if (!finfo.Exists)
+                {
+                    FileStream fs = File.Create(_logFilename);
+                    fs.Close();
+                }
+                else
+                {
+                    try
+                    {
+                        if (finfo.Length > 1024 * 1024 * 20)
+                        {
+                            File.Delete(_logFilename);
+                            FileStream fs = File.Create(_logFilename);
+                            fs.Close();
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        Debug.WriteLine(ex);
+                    }
+                }
+            }
+
+            Logger = new SimpleLogger();
+
+
+        }
+
+
+    }
+}
diff --git a/EvernoteToNotionChrome/Utils/SimpleLogger.cs b/EvernoteToNotionChrome/Utils/SimpleLogger.cs
new file mode 100644
index 0000000..54e122a
--- /dev/null
+++ b/EvernoteToNotionChrome/Utils/SimpleLogger.cs
@@ -0,0 +1,174 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EvernoteToNotionChrome.Utils
+{
+    public class SimpleLogger
+    {
+        private const string FILE_EXT = ".log";
+        private readonly object fileLock = new object();
+        private readonly string datetimeFormat;
+        private readonly string logFilename;
+
+        /// <summary>
+        /// Initiate an instance of SimpleLogger class constructor.
+        /// If log file does not exist, it will be created automatically.
+        /// </summary>
+        public SimpleLogger()
+        {
+            datetimeFormat = "yyyy-MM-dd HH:mm:ss.fff";
+            logFilename = System.Reflection.Assembly.GetExecutingAssembly().GetName().Name + FILE_EXT;
+
+            // Log file header line
+            string logHeader = logFilename + " is created.";
+            if (!System.IO.File.Exists(logFilename))
+            {
+                WriteLine(System.DateTime.Now.ToString(datetimeFormat) + " " + logHeader);
+            }
+        }
+
+        /// <summary>
+        /// Log a DEBUG message
+        /// </summary>
+        /// <param name="text">Message</param>
+        public void Debug(string text)
+        {
+            WriteFormattedLog(LogLevel.DEBUG, text);
+        }
+
+        public void Debug(object text)
+        {
+            WriteFormattedLog(LogLevel.DEBUG, text == null ? "null" : text.ToString());
+        }
+
+        /// <summary>
+        /// Log an ERROR message
+        /// </summary>
+        /// <param name="text">Message</param>
+        public void Error(string text)
+        {
+            WriteFormattedLog(LogLevel.ERROR, text);
+        }
+
+        public void Error(object text)
+        {
+            WriteFormattedLog(LogLevel.ERROR, text == null ? "null" : text.ToString());
+        }
+
+        /// <summary>
+        /// Log a FATAL ERROR message
+        /// </summary>
+        /// <param name="text">Message</param>
+        public void Fatal(string text)
+        {
+            WriteFormattedLog(LogLevel.FATAL, text);
+        }
+
+        /// <summary>
+        /// Log an INFO message
+        /// </summary>
+        /// <param name="text">Message</param>
+        public void Info(string text)
+        {
+            WriteFormattedLog(LogLevel.INFO, text);
+        }
+
+        public void Info(object text)
+        {
+            WriteFormattedLog(LogLevel.INFO, text == null ? "null" : text.ToString());
+        }
+
+        public void Info(string text, params object[] args)
+        {
+            WriteFormattedLog(LogLevel.INFO, string.Format(text, args));
+        }
+
+
+        /// <summary>
+        /// Log a TRACE message
+        /// </summary>
+        /// <param name="text">Message</param>
+        public void Trace(string text)
+        {
+            WriteFormattedLog(LogLevel.TRACE, text);
+        }
+
+        /// <summary>
+        /// Log a WARNING message
+        /// </summary>
+        /// <param name="text">Message</param>
+        public void Warning(string text)
+        {
+            WriteFormattedLog(LogLevel.WARNING, text);
+        }
+
+        private void WriteLine(string text, bool append = false)
+        {
+            try
+            {
+                if (string.IsNullOrEmpty(text))
+                {
+                    return;
+                }
+                lock (fileLock)
+                {
+                    using (System.IO.StreamWriter writer = new System.IO.StreamWriter(logFilename, append, System.Text.Encoding.UTF8))
+                    {
+                        writer.WriteLine(text);
+                    }
+                }
+            }
+            catch
+            {
+                throw;
+            }
+        }
+
+        private void WriteFormattedLog(LogLevel level, string text)
+        {
+            string pretext;
+            switch (level)
+            {
+                case LogLevel.TRACE:
+                    pretext = System.DateTime.Now.ToString(datetimeFormat) + " [TRACE]   ";
+                    break;
+                case LogLevel.INFO:
+                    pretext = System.DateTime.Now.ToString(datetimeFormat) + " [INFO]    ";
+                    break;
+                case LogLevel.DEBUG:
+                    pretext = System.DateTime.Now.ToString(datetimeFormat) + " [DEBUG]   ";
+                    break;
+                case LogLevel.WARNING:
+                    pretext = System.DateTime.Now.ToString(datetimeFormat) + " [WARNING] ";
+                    break;
+                case LogLevel.ERROR:
+                    pretext = System.DateTime.Now.ToString(datetimeFormat) + " [ERROR]   ";
+                    break;
+                case LogLevel.FATAL:
+                    pretext = System.DateTime.Now.ToString(datetimeFormat) + " [FATAL]   ";
+                    break;
+                default:
+                    pretext = "";
+                    break;
+            }
+
+            System.Diagnostics.Debug.WriteLine(pretext + text);
+
+            WriteLine(pretext + text, true);
+        }
+
+        [System.Flags]
+        private enum LogLevel
+        {
+            TRACE,
+            INFO,
+            DEBUG,
+            WARNING,
+            ERROR,
+            FATAL
+        }
+    }
+}