This paper elaborates on the design ideas on the settlement observation of Yihe building of the central hospital of Yiyang city and describes the process of the control network layout and measurement. Based on careful analysis and processing of the observational data obtained from the settlement observation of Yihe building, the size and average speed of the settlement of Yihe building can be calculated, so can the deformation trend of it, the aim of which is to help the hospital authorities take c...