1. INTRODUCTION
Human-machine interface technology has been investigated for several decades. Recent research makes more emphasis on the recognition of nonverbal information, especially on the topic of emotion reaction. Scientists have found that emotional skills can be an important component of intelligence, especially for human-human communication. Although the human-computer interaction is different from the human-human communication, some theories show that the human-computer interaction is basically following the basics of human-human interaction [1]. In the past years. there are several works on emotion recognition. Some research focused on multimodal emotion recognition [2] [3]. other research focused on only one kind of information [4] [5]. However, only few papers focused on emotion recognition from textual input [6].