A hot forming of aluminum plate using a grid type die is a forming process to make a shell plate for the production of a spherical LNG tank. This process is characterized by using a grid-type die with an additional air cooling system for reducing the cooling time of the heated plate after hot forming. The thermal residual stress caused by deviation of temperature distribution between inside and outside of aluminum plate influences considerably on the dimensional accuracy of product. Shape of the hot formed aluminum plate is recovered by this unexpected residual stress. Thus, the control of temperature condition in cooling step is very important to improve the dimensional accuracy of hot formed aluminum plate. In this study, the FE-analysis of hot forming with grid type die is performed to evaluate the effects of stress distribution of aluminum plate in cooling sten on the dimensional accuracy of final product.