Kata kunci: emosi, action unit, identifikasi emosi Abstract --Face expression is universal language. In fact, face expression can help decision making. In 1972, Paul Ekman classified basic human emotion into six: happy, sad, surprised, angry, afraid, and disgust. Then, Ekman and Wallace Friesen develop a tool to measure movement of facial muscles called Facial Action Coding System (FACS). It determines facial expression based on facial muscles movement, called Action Unit (AU). This research aims to find excited emotion based on AU which has determined by Paul Ekman