To overcome the shortage of space, the Hong Kong government has been reclaiming lands along the seafront, which will introduce continuous ground settlement since the beginning of reclamation. The Hong Kong International Airport, 75% of which was reclaimed from the sea, is one of the largest artificial islands in the world (Jiang & Lin, 2010). It was built on two original islands in the sea, i.e., Chek Lap Kok and Lam Chau. The settlements are possibly caused by unconsolidated subsurface soil layers, penetration of seawater, tidal load, the impacting force of the landing airplanes, and etc. This research reveals the settlement of the airport between October 2008 and December 2009 using 31 TerraSAR-X spotlight images with 1 m resolution. Data processing is accomplished by the SkySense software developed by our research group. The monitored results confirm that two original islands remain stable during this period, whereas other positions are experiencing different levels of settlements and the largest settlement velocity is approximately 30 mm/year.