An information display method by use of a card including an information display section which includes a reversible thermosensitive recording portion capable of recording information reversibly therein with application of heat thereto, comprises the steps of (1) storing first information in the information display section; (2) comparing the first information stored in the information display section with a reference information; (3) displaying a second information in the information display section, based on the comparison of the first information and said reference information, and repeating the steps (1) to (3) by updating the first information and the second information when further information is stored in the information display section.