This book systematically introduces the advancement of transparent soil modelling technique and its application. The transparent soil modelling technique provides an essential tool for visualizing soil-structure interaction and other geotechnical problems such as grouting, soil plugging. The geotechnical properties of the newest transparent soils were reported on model sand, clay and rock. In addition, more advanced image processing methods were summarized. In this book, numerous applications of transparent soil modelling techniques for different geotechnical problems were presented, and the results obtained are supplemented by numerical calculation and theoretical analysis.