Transient change of temperature is an important exciting factor which affects the structure stability of large-aperture optical element in the inertial confinement fusion (ICF) driver. Multi-channel high-precision temperature monitoring instrument is adopted to measure the circumstance temperature of large-aperture optical element in the switchyard of the technical integration line (TIL) for 24 h. The temperature changing curve with time is got. The finite element software is used to build the finite element model for the optical element is built. With the measured temperature as the load, the plane rotation curve of the large-aperture optical element in 24 h is analyzed. During 24 h, the circumstance temperature change is 0.45 ℃, and the maximum rotation angle is 1.12 μrad. The results indicate that the largest rotation of the optic element exceeds the requirement of beam shot change range, but the success ratio of beam shot can be improved by adjusting beam shot time and reducing waiting time between alignment and beam shot.