Abstract: The omni-directional mobile platform is maneuverable and good at obstacle avoidance, as it can move straight in any direction and perform rotational motion at the same time. In this paper, an odometer positioning system is introduced with error elimination for NI myRIO-1900. Compared to traditional odometer positioning system which mainly depends on encoder and gyroscope, infrared sensor and ultrasonic sensor are introduced to our system. Through mean filter and periodical clearing cumulative error, our system could measure the posture of the platform accurately. This method has been applied in the 2017 the 44th World Skills Competition mobile robotics project. The competition result proved that our positioning system has good performance, which satisfies the requirement of high speed and precise motion control. The odometer positioning system with error elimination presented in this paper is cost-effective and practicable, which is a precise control scheme.