The invention discloses a recorder device. The recorder device comprises a recorder body, a main control system, a differential amplifier, an analog filter and an analog amplifier, the recorder body is provided with a shell, a lens cover and a wide-angle lens and internally provided with a built-in printed circuit board (PCB), and the main control system is provided with the differential amplifier, the analog filter and the analog amplifier. According to the recorder device, an electrode sensor is adopted to collect image signals transmitted from a capsule endoscope to the skin of the human body and to process and store the image signals; the image signals can be uploaded to a computer through a USB data interface, and doctors can read images and carry out disease diagnoses through the adoption of matched software; in the process of performing capsule endoscope detection, real-time image monitoring can be conducted in a wireless mode, the digestive organ where a capsule is located and the position of the capsule are conveniently determined, and therefore better diagnoses are conducted.