In recent years, there are many studies being performed in order to solve the problem of social robot, it is predicted that social robot will co-exist with people to expand the robot market in the future. The user-friendly robot which would be able to express emotion recognize and facial expression by the image sensing technology. The robot has much added value functions, i.e. conversation, facial recognition, facial expression recognition and emotion. By utilizing these functions of the robot, the communication becomes convenient between human and robot.