A camera system for installation inside a refrigerator, wherein the camera system comprises: a camera including a camera module, a first case and a second case coupled to the first case to internally form a predetermined space where the camera module is accommodated; the camera module comprising a camera lens, a body, and electrical components to drive the camera; the first case including a transparent window; said transparent window being spaced a certain distance from the camera lens; the camera system being characterized in that said camera system further comprises: a camera housing configured to seat and fix the camera at a determined position in the camera housing, wherein the camera housing comprises: a fixing surface arranged to adjoin an upper wall of a storage compartment of the refrigerator; a front surface arranged to face an access opening of the storage compartment and two 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 first case of the camera to be exposed therethrough, wherein the front surface of the camera housing is arranged to extend to a lower position than the opening formed in the top surface of the camera housing when adjoined to the upper wall of the storage compartment between the access opening of the storage compartment and a front edge of a plurality of shelves installed in the refrigerator. a camera including a camera module, a first case and a second case coupled to the first case to internally form a predetermined space where the camera module is accommodated; the camera module comprising a camera lens, a body, and electrical components to drive the camera; the first case including a transparent window; said transparent window being spaced a certain distance from the camera lens; the camera system being characterized in that said camera system further comprises: a camera housing configured to seat and fix the camera at a determined position in the camera housing, wherein the camera housing comprises: a fixing surface arranged to adjoin an upper wall of a storage compartment of the refrigerator; a front surface arranged to face an access opening of the storage compartment and two 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 first case of the camera to be exposed therethrough, wherein the front surface of the camera housing is arranged to extend to a lower position than the opening formed in the top surface of the camera housing when adjoined to the upper wall of the storage compartment between the access opening of the storage compartment and a front edge of a plurality of shelves installed in the refrigerator. a fixing surface arranged to adjoin an upper wall of a storage compartment of the refrigerator; a front surface arranged to face an access opening of the storage compartment and two 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 first case of the camera to be exposed therethrough, wherein the front surface of the camera housing is arranged to extend to a lower position than the opening formed in the top surface of the camera housing when adjoined to the upper wall of the storage compartment between the access opening of the storage compartment and a front edge of a plurality of shelves installed in the refrigerator.