Disclosed are a display control module and a display control method of a display device. The display control module includes a control signal generation module and a plurality of IP core modules. The control signal generation module shields an initial frame control signal based on an enabled underrun signal to generate a frame control signal which is disabled. The plurality of IP core modules are coupled to the control signal generation module, receive the frame control signal, and perform image processing on image data of the same frame based on the frame control signal, so as to generate display image data corresponding thereto. Therefore, when the display device displays abnormally, the plurality of IP core modules continue to perform image processing on a current frame based on the frame control signal.