Combined with the embedded processor LM3S1607 with ultrasonic sensor, an intelligent ultrasonic distance measuring device is designed in this article. The 32 bit embedded microprocessor of the ARM core chip LM3S1607 is used. Sending and receiving modules are made up of two pieces of P89LPC938 microcontroller and ultrasonic sensors. Communication architecture of upper and lower computer is formed via the I2C serial bus to achieve two way ultrasonic distance measuring. Temperature measurement of ultrasonic ranging system is realized through the high precision temperature sensor LM75A. Ultrasonic sound velocity is compensated to improve the measurement accuracy. Meanwhile the distance measuring device has the function of LCD displaying and voice broadcast test distance. Interface circuit and application program are designed and developed. The design method of two way ultrasonic range finder is also introduced.