An information processing system includes a processing device communication with an information terminal. The system includes an input unit receiving user input, a display unit, a screen transition unit which decides a screen to be displayed and performs a screen transition based on the input of the input unit and the display unit, a screen transition score calculation unit which calculates a screen transition score for each screen transition, an item database which associates and stores an item name and attribute, an attribute score database which associates and stores the item attribute and an attribute score, an item search unit which searches the item database based on the user's input, and extracts the item attribute, and a score addition unit which adds the screen transition score calculated by the score calculation unit to the attribute score associated with the item attribute extracted by the item search unit.