To provide an information display device suitable for a portable terminal for displaying on a display screen images of actual printed pages. The information display device includes: storing means for storing various data and programs used to execute applications; controlling means for controlling program execution, data processing, and input/output devices; communication means for receiving image data and associated attribute data; inputting means for receiving event input generated by various operations; and displaying means for displaying the image data and attribute data on a display screen; wherein said information display device, when transmitting search data based on event input received by the inputting means, receiving XML data describing addresses and display positions of the corresponding image data and attribute data, and receiving and displaying the relevant image data and attribute data, the controlling means has prefetching means for storing image data associated with page changes from among the received image data constituting each page in a display region of the storing means based on a predetermined priority.