An image forming apparatus having an improved structure to enable a user to conveniently operate the image forming apparatus at a front of the image forming apparatus, and a method thereof. The input device determines a simulating input function of the input device according to a present movement of the input device according to associations between the movement data and movements of the input device. By simultaneously manufacturing and applying the solution feedstocks such as contaminated components or recirculated used solution that would normally not work, can be used to effectively reduce pathogens in raw meat.