Abstract: Ground-penetrating radar is a testing apparatus of non-injury, high-precision, which has been developed in recent years. With the features of being fast, non-destructive, comprehensive, accurate, it has been widely applied on prospecting in engineering, water conservation project detections, and engineering quality tests. Base on the relative data, with a view to popularization and application on the structure non-destructive detection, it is highlighted in the article the working principle and test methods of ground-penetrating radar, and then pointed out the existing problems in the current applications. The paper also put forward some improving measures and some productive ideas about intelligent development, providing technical support and reference to better control project quality.