Taking several typical project cases in Guangzhou where shield machines bore underneath buildings and structures as example, the author makes a brief analysis and presentation on the theory of settlement resulted from tunnel boring underneath buildings and structures, so as to probe into the prediction of the stress of the foundations of the buildings and structures before the arrival of the shield machines and probe into the preconsolidation measures. Furthermore, the author also presents the selection of the boring parameters and the determination of the monitoring plan for the boring of theshield machines underneath the buildings and structures.