1. An in-vivo examination system comprising: a body-insertable apparatus that moves in a subject; and an external device that acquires information about an inside of the subject, the external device including a location acquiring unit that acquires a plurality of first locations of the body-insertable apparatus in the subject; a trajectory generating unit that generates a first movement trajectory of the body-insertable apparatus in the subject, based on the plurality of first locations; a trajectory storage unit that stores a second movement trajectory; and a scale adjusting unit that adjusts the first movement trajectory to the second movement trajectory.