Abstract: Some engineering problems are caused by ground unequal settlements. In order to investigate the influence of the ground unequal settlements on the superstructure, a finite element method simulating ground(or pile ground) is developed by three-dimensional elastic support, which could integrally analyze the interaction among structure, foundation and ground. The comparative analysis among three-dimensianal elastic support,the elastic support model and immobility model for the example of the Crystal Stone Lobby of Juvenile Palace in Shenzhen is done by the ANSYS software of FEM. The method has been proved rationality. Some important conclusions will give advice to structural design.