This paper proposes a method that rotation angle of servo motor and distance values of ultrasonic sensor are used for tracking an object in real-time while the robot keeps regular distance.Object detection distance widens by using ultrasonic sensors and object recognition,and movement of robot is controlled by angle of servo motor and distance of ultrasonic sensors.Not adopting the existing tracking methods:camera,laser-infrared(LRF)and many ultrasonic sensors,the proposed method proves that it is possible to track object using ultrasonic sensor and servo motor.Trajectory of robot is represented and analysed according to movement of object in limited conditions. This paper proposes a method that rotation angle of servo motor and distance values ​​of ultrasonic sensor are used for tracking an object in real-time while the robot keeps regular distance. Object detection distance widens by using ultrasonic sensors and object recognition, and movement of robot is controlled by angle of servo motor and distance of ultrasonic sensors .Not employs the existing tracking methods: camera, laser-infrared (LRF) and many ultrasonic sensors, the proposed method proves that it is possible to track object using ultrasonic sensor and servo motor .Trajectory of robot is represented and analysed according to movement of object in limited conditions.