Provided are: an information providing system, an information providing method and a computer program, which are able to detect a position on a screen of a display specified by each of multiple users who view the screen, and to provide each user with information according to the position.In an information distribution system including a computer 1 having a storage part in which information having a hierarchical structure is stored, a display 2 connected to the computer 1 and displaying the information, and a mobile communication device 3 communicating with the computer 1, the mobile communication device 3 has an image obtaining part for photographing a part of the information displayed on the display 2 and obtaining an image, and a transmission part transmitting the obtained image to the computer 1, and the computer 1 is configured to have a reading part reading out the information having a hierarchical structure from the storage part based on the image transmitted from the mobile communication device 3 and a transmission part transmitting the read-out information to the mobile communication device 3.