Disclosed herein is a method of processing an image of a medical monitor. The method includes performing primary scaling of an image in longitudinal and transverse directions of a monitor panel according to a preset mode, when the image input to the monitor is a high definition (HD) image, determining a position of the image using a panel size of the monitor and an image size such that the image is displayed at a center of the panel, when the image is the HD image or a standard definition (SD) image, and loading preset information from an internal memory of the monitor to apply the preset information to the image. An apparatus for processing an image of a medical monitor is also disclosed herein.