The invention discloses an intelligent cognitive robot and a cognitive system thereof. The cognitive system comprises understanding modules and emotional modules; the understanding modules include a sound understanding module, a visual understanding module and a touch understanding module; the emotional modules include a sound emotional cognitive module, an expression emotional cognitive module and a touch emotional cognitive module; emotional weight of external instructions is determined, the emotional modules correspondingly call information in a sound database, an expression database and/or a behavior database according to the emotional weight and control corresponding executing pieces to made emotional responses. The invention further discloses an intelligent cognitive robot adopting the cognitive system. The corresponding responses are made to the external instructions through sounds, images and touch, question and answer type of interaction with the external instruction can be performed, and the head, all fours and/or the body of the robot can response to the emotional weight of the external instruction with actions and sounds with emotions.