Centrifuge modelling is a powerful and versatile tool to investigate geotechnical problems. This lecture will first highlight the advantages of centrifuge model testing and briefly cover the centrifuge model scaling laws. This is followed by the applications of centrifuge model testing on sample onshore, marine and offshore geotechnical problems. An example of onshore problem examines the effect of rising ground water table on the bearing capacity and settlement of shallow foundation on loess soil. This is followed by a marine geotechnical problem concerning the movement of gravity caisson wharf front structures under container port service loading and the effects of breaking waves on gravity caisson breakwater structures. The example of offshore geotechnical problem investigates the effects of jack-up spudcan installation on adjacent piled foundation supporting the permanent jacket platform. Through these sample problems, the advantages and possible pitfalls of centrifuge modelling technique are illustrated.