An information processing device installed in front of a driver's seat inside a vehicle, the information processing device comprising: a first input port inputting a first image data imaged by a first imaging device, the first imaging device imaging a driver's face; a second input port inputting a second image data imaged by a second imaging device, the second imaging device imaging a front side of the vehicle; a display for displaying an image data; and a controller determining the image data displayed on the display in accordance with an installation location of the information processing device inside the vehicle, wherein the first imaging device is provided on a surface of the information processing device on which the display is provided and the second imaging device is provided on a surface opposite to the surface of the information processing device on which the display is provided, the controller estimates the installation location of the information processing device on a basis of a position and direction of the driver's face in the image captured by the first imaging device, detected by means of the first image data, distance information to an object, detected by means of the second image data, and an amount of change in the luminance of the imaging range acquired by the second imaging device, the controller determines an image data of an object existing outside of the vehicle or an image data captured ahead of the vehicle, as the image data displayed on the display when the installation location of the information processing device is estimated at an upper side as viewed from the driver, and the controller determines navigation information or an image data of a meter panel as the image data displayed on the display when the installation location of the information processing device is estimated at a lower side as viewed from the driver. a first input port inputting a first image data imaged by a first imaging device, the first imaging device imaging a driver's face; a second input port inputting a second image data imaged by a second imaging device, the second imaging device imaging a front side of the vehicle; a display for displaying an image data; and a controller determining the image data displayed on the display in accordance with an installation location of the information processing device inside the vehicle, wherein the first imaging device is provided on a surface of the information processing device on which the display is provided and the second imaging device is provided on a surface opposite to the surface of the information processing device on which the display is provided, the controller estimates the installation location of the information processing device on a basis of a position and direction of the driver's face in the image captured by the first imaging device, detected by means of the first image data, distance information to an object, detected by means of the second image data, and an amount of change in the luminance of the imaging range acquired by the second imaging device, the controller determines an image data of an object existing outside of the vehicle or an image data captured ahead of the vehicle, as the image data displayed on the display when the installation location of the information processing device is estimated at an upper side as viewed from the driver, and the controller determines navigation information or an image data of a meter panel as the image data displayed on the display when the installation location of the information processing device is estimated at a lower side as viewed from the driver.