This study is aimed at how the mandailing people a tribe who live in the southern part of tapanuli label and categorize the words of emotion. This study starts with an assumption that the people actively provide the label and structure of their experiences. Those labels and structures are stored in the memory and used to recognize and understand the new experiences by mapping them with the existing structure. The categorization of the word of emotion has been proved to be culturally motivated in the sence that each culture organizes them differently. Data were collected using introspective methods and then those data were crosschecked whit other two native speaker of that language. The findings shows that the classification which is formerly negative/positive dichotomies needs to be expanded into negative/neutral/positive ones. The classification of negative emotion into anger fear disgust /hate and sadness and the classification is applicable in that language. There is an indication that the subcategory desire/love need to be reclassified into two different categories. The words of emotion for fear and happiness were not developed advancedly in this culture. The plausible reason for this is that the culture tends not to show fear and happiness in public too much.