Abstract: In this paper, the TM30 goeorobot is used to monitor the deformation of Beijing Polytechnic College library during the loading of books. The monitoring data are adjusted strictly to obtain the monitoring results. What is more, according to the monitoring results, the deformation contour line is plotted and the deformation in each direction is displayed, therefore, the dangerous deformation area is visually expressed, Finally, the deformation monitoring law during the building loading is obtained. At the early stage of loading, the deformation of the north-south direction is unstable as "S", while the deformation of the east-west direction tends to be around the loading position of the book. From what has been mentioned above, we can come to the conclusion that the length and width of the building have an impact on the stability of the building, and it is necessary to increase the building load and take protective measures on the periphery, where the building needs to be loaded. The research has practical implications for architectural design.

Key words: goeorobot, deformation monitoring, free station method, contour line