A ship information display device is provided, which may include a first processor, a second processor, a graphic processor, and a display. The first processor may generate a first image based on first ship information received from a first ship sensor and generate a screen to be synthesized including the first image and a blank image. The second processor may generate a second image based on second ship information received from a second ship sensor. The graphic processor may generate a synthesized screen including the first image and the second image by replacing the blank image of the screen to be synthesized by the second image generated by the second processor. The display may display the synthesized screen.