An image processing system includes an image processing apparatus. A portable information terminal is communicable with the image processing apparatus. The image processing apparatus includes a first display section, a storage section, and a first control section. The storage section stores screen data to be displayed on the first display section. The first control section controls the first display section to display an image indicating a first region contained in a virtual display screen corresponding to the screen data. The portable information terminal includes a second display section and a second control section. The second control section controls the second display section to display an image indicating a second region generated correspondingly to positional relationship information indicating a relative positional relationship between the first display section and the second display section.