An intubation device assembly includes an intubation device, an optical imaging device attached to the intubation device, an image display device attached to the intubation device, a first position sensor operatively connected to the image display device, a second position sensor operatively connected to the intubation device, and a force sensor operatively connected to the intubation device. A controller operates the image display device to display a video image of the optical imaging device and at least one parameter corresponding to an operation of at least one of the optical imaging device, the first position sensor, the second position sensor, and the force sensor. The controller further determines an orientation of a screen of the image display device according to an operation of the first position sensor. The controller displays the least one parameter in a position on the screen according to the orientation of the screen.