The invention discloses a method, device and system for automatically configuring a display screen, and the method comprises the steps: 1), obtaining a screen mark of the display screen through a scanning gun if the display screen can display a picture during startup, and obtaining the screen mark of the display screen through an intelligent terminal if the display screen does not display the picture; comparing the screen identifier with the current screen identifier: if the screen identifier is the same as the current screen identifier, calling and ending the current screen parameter and the configuration information, and if the screen identifier is different from the current screen identifier, storing a new screen identifier, and setting the screen change identifier to be true; 2) initializing and reading a screen change sign, if the screen change sign is true, entering step 3), and if the screen change sign is false, calling current screen parameters and configuration information, and ending; 3) reading a new screen identifier, obtaining the screen parameter from the screen and the screen identifier mapping table, and obtaining the corresponding configuration information from the configuration table to update the driving information, so the display control device can correctly display, update the current screen identifier to be the new screen identifier, set the screen change identifier to be false, and finish the operation. Automatic screen configuration can be realized, human intervention is reduced, the error probability is reduced, and the production efficiency is improved.