To provide a charged particle system capable of facilitating comparison between an actual pattern and an ideal pattern using not only two-dimensional CAD data but also three-dimensional CAD data. A first source pad is electrically coupled to source electrodes in the first set of finger arrays. The food heat-exchange device includes a heat-exchange plate, which is provided at a surface thereof with a contact portion to come into contact with food and at the other surface thereof with a pin to facilitate heat-exchange. An application server couples the integration tier and the presentation tier to determine task sequencing in the presentation tier. A retaining member is adapted to limit separation displacement between the first and second members.