An information processing device installed inside a vehicle includes a first input port inputting a first image data imaged by a first imaging device, a second input port inputting a second image data imaged by a second imaging device, a display 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. The controller estimates the installation location of the information processing device based on a position of a human being's face detected by the first image data and distance information to an object detected by the second image data.