Urban land subsidence has always been a problem that coastal cities pay close attention to. It is of great significance to conduct in-depth research on land subsidence which was induced by high-rise buildings in the coastal cities. In this study, the elevation information of land subsidence monitoring sites were firstly obtained to analyze the spatial difference of land subsidence in Xiamen City. Secondly, the influence of construction land, floor area ratio and land use conversion information on land subsidence in Xiamen City was discussed emphatically. The land subsidence risks of Xiamen Island were evaluated, which can provide a priori knowledge for the research on three-dimensional layout and optimization of high-rise buildings in Xiamen Island. The results show that: (1) from 2001 to 2015, the overall elevation of Xiamen City presented a downward trend and was slow. Meanwhile, the urban construction scale continued to increase and the construction area increased in Xiamen City, which were the same as the development trend of urban land subsidence in Xiamen City. (2) The density of high-rise buildings needs to reach a certain degree to have an impact on the land subsidence in Xiamen City. There is no significant correlation between floor plot ratio and land subsidence in Xiamen Island. (3) Among the impacts of land subsidence due to different land transformed construction land, the original water area total land subsidence is the most obvious. The longer the completion time, the greater the amount of subsidence. After the original cultivated land conversion into high-rise buildings, the settlement obviously occurred. With the extension of the construction time, the settlement increases gradually. The settlement of the original garden and forest land only occurs in a small number of areas and there is no significant difference from the completion time. (4) Xiamen Island can be used in urban construction areas where 53.34% of it is above the risk level of land subsidence. In addition, the effective suggestions and measures are also given to prevent the risk of urban land subsidence in this study. The results of this study can provide important data support for land subsidence monitoring, planning, design and decision-making in the urbanization process of Xiamen City, and provide a scientific basis for the sustainable development of the cities. The results can also provide theoretical basis and reference significance for the land subsidence monitoring analysis and sustainable development research for other cities at home and abroad.