In order to solve the problem of the SBAS-InSAR technique being seriously influenced by the atmosphere in the acquisition of surface deformation information of seaside cities with high water vapor saturation, 23 scenes of Sentinel-1A SAR image data were selected, and the surface deformation information of Qingdao Jiaozhou Bay Bridge was monitored from January 2021 to June 2022. The combination of the time-series SBAS-InSAR technique with the GACOS atmospheric correction model was utilized. The deformation characteristics of the bridge and its temperature effects were analyzed using the linear model and linear-temperature model. It is observed that the overall deformation rate of the bridge is within the controllable range. The surface deformation process is nonlinear and exhibits a high correlation with the mean temperature variation. The surface deformation process, which is fitted by the linear-temperature model, is found to be in high agreement with the surface deformation process monitored by the combined time-series SBAS-InSAR technique and GACOS atmospheric correction model, a seasonal variation pattern is demonstrated.