The development of ultrasonic testing system based on Bluetooth communication is a system which is measure the ultrasonic data and transmits to this data to user display using Bluetooth wireless communication. It has great application prospect in various industries. The entire hardware environment is set up on raspberry pi board. Data communication by Bluetooth is done in Linux environment by using of BlueZ protocol stack. The data capture by the ultrasonic sensor is displayed on Linux PC. Ultrasonic sensor can be used for automotive ultrasonic distance measurement system, ultrasound imaging (sonography), ultrasonic testing, ultrasonic welding etc.