Automatic emotion detection is a process of detecting emotions from facial expressions, text or audio clips. Collecting and labeling such data is a difficult process and time consuming. This paper proposes detecting emotions from text documents using the Naïve Bayes classifier. Detecting emotions from text can be a used a useful tool in psychological counseling. Different methods are used to detect emotions using signal processing, AI, text processing and Bayesian network. Emotion detection from text is from the written text or speech text.