Abstract: An information update system includes a first portable terminal, a server and a second portable terminal. The first portable terminal captures a facial image of a user of the first portable terminal and obtains facial characteristic information and corresponding EXIF information of the facial image. The server stores photo albums and facial characteristic information and corresponding EXIF information of each photo album. The second portable terminal runs an application with a preset background image. The server matches the received facial characteristic information and corresponding EXIF information to the stored facial characteristic information and corresponding EXIF information, and further outputs matching information including at least one of the stored photo albums. The second portable terminal updates the photo album to the application to replace the preset background image.