The present disclosure provides a method for detecting a display device. The method includes: sending a first instruction to a display device to enable all display sub-screens of the display device display a first test picture; judging whether all the display sub-screens meet the display standard or not according to a display condition of the first test picture; in response to that at least one display sub-screen does not meet the display standard, performing a first reset operation on the display sub-screen, and enabling the display sub-screen subjected to the first reset operation to display the first test picture again; judging whether the display sub-screen displaying the first test picture again meets the display standard or not; and in response to that the display sub-screen displaying the first test picture again does not meet the display standard, replacing the display sub-screen by using a standby display sub-screen.