On the basis of the ultrasonic detection theory, building a SoPC platform, combined with other circuit, design a set of concrete ultrasonic detection system, the system sets of ultrasonic transmitting, receiving, synchronization of acoustic parameter automatic detection, data analysis and processing, the results of real-time display, data storage and output function, has low volume, low power consumption, upgrade convenient, easy to use intuitive and other advantages. To testing on no defects in bored concrete pile and defective bored concrete pile, and satisfactory results are obtained.