Moving bed and fixed bed filled with granular material have wider applicability for many chemical engineering processes. In this report we investigate the moving bed and fixed bed as the dust collection apparatus. It is well known pressure drop across the bed is one of the most important characteristics of this type apparatus, then as the first step, we obtained the experimental results about the correlation between pressure drop of bed and the flow quantity of air (this time, only air flow without containing dust). Experiments have been done for the beds with different geometry and the several kinds of air inlet positions.