A camera apparatus includes: a main body, on which a camera is mounted, wherein the camera is configured to capture an image of a surveillance area; a first attachment member coupled to the main body, and configured to be coupled to a second attachment member coupled to an external device to connect the external device to the main body; and a hanger connected to the main body, the hanger having a ring shape that forms a closed loop along a hole formed on an inside of the ring shape, wherein the hanger extends outwards from a side surface of the main body.