A camera system is provided for an inside of a refrigerator. The camera system includes a camera module that includes an image sensor, a camera lens, electrical components configured to drive the image sensor, and a transparent window spaced a predetermined distance from the camera lens. The camera system also includes a camera housing configured to seat and fix the camera module at a predetermined position in the camera housing. The camera housing includes a fixing surface arranged to adjoin an upper wall of a storage compartment of a refrigerator; a front surface arranged to face an access opening of the storage compartment and side surfaces connecting the front surface to a rear surface of the camera housing; and a top surface provided with an opening allowing the transparent window of the camera module to be exposed therethrough.