Abstract: The early dismantling of temporary supports is a key step in the construction process of most space steel structures. To ensure the smooth progress of the unloading process, it is necessary to conduct a theoretical analysis of the dismantling plan and real-time monitoring of stress and deformation during the dismantling process. The space curved steel structure of the National Cyber Security Talent and Innovation Base Exhibition Center was taken as an example. For this structure with peculiar shapes and the first in China, three dismantling for temporary supports early schemes were proposed for simulation analysis, including one-way successive dismantling, the order of dismantling from the outside to the inside and dismantling from the inside to the outside was simulated and calculated in sequence. The results showed that the structure had the best overall performance when dismantling from the inside to the outside. The stress and deformation data monitored during the actual dismantling process were compared with comparative analysis of theoretical values. The results of stress and deformation changed during actual dismantling were close to the theoretical analysis results. This dismantling scheme was safe and reliable, and could provide a reference for dismantling the temporary supports of similar space steel structures.