the present invention addresses the problem of providing a surrounding environment recognition device that presents to a user a sensing - enabled range that varies depending on a contamination state of a lens . the present invention is characterized by comprising : an image - capturing unit that acquires an image ; an application execution unit that executes an application for recognizing an object to be recognized from the image ; a lens state diagnosis unit that diagnoses the lens state of a camera on the basis of the image ; a sensing range determination unit that determines a sensing - enabled range allowing the sensing of the object to be recognized with the lens state diagnosed by the lens state diagnosis unit when the application is executed , and a sensing - disabled range not enabling the sensing of the object to be recognized ; and a notification control unit that notifies the sensing - enabled range of the sensing range determination unit .