Hi, how about the weather on 11/09/14 - 17/09/14 period in Taipei? what type of cloth should bring?

Well, based on the weather records in the past years, it shall be hot and wet during that period, with the average temperature of around 28℃. It may be cloudy then, but rainy days shall probably happen as well! You are advised to take along summer clothes, a light jacket and simple rainy gear!