The objective of this research is to develop the industrial-scale fluid bed dryer for paddy by scale-up of lab-scale experimental data. The developed dryer was conducted by simulation using a two phase model. Firstly, the experimental works by using lab-scale batch fluid bed dryer, was conducted to determine the drying curve of paddy (X 0.32 kg/kg dry base). In the experimental works,the inlet air temperature m, and air temperature 50; 70; 100 ∘ C on drying process were studied.