An object of the present invention is that the examiner easily picks up a series of images over a desired region in a desired digestive tract without such troublesome examination work that the examiner successively knows the imaging field to the inside of the digestive tract. A body-insertable device system of the invention includes a capsule endoscope (1), a permanent magnet (3), and a position display sheet (2). In the capsule endoscope (1), an imaging unit for picking up the images of the insides of a subject (100), and a magnet are contained in a casing. The capsule endoscope sends a radio signal containing information of the images of the insides of the subject (100) to outside the capsule endoscope. The permanent magnet (3) generates a magnetic field for application to the capsule endoscope (1) in liquid (Lql) having been introduced into the subject (100) and changes at least one of a position and a posture of the capsule endoscope (1) by the magnetic field. The position display sheet (2) visually presents an approaching position of the subject (100) that the permanent magnet (3) approaches to generate a magnetic field.
