A camera apparatus includes: a main body, on which a camera is mounted, wherein the camera is operated according to a signal applied from the outside, is configured to change a surveillance area by rotating in vertical and horizontal directions, and capture an image of the surveillance area; an attachment coupled to the main body, and configured to connect an external device to the main body; and a hanger in which a hole is formed, the hanger being connected to the main body for coupling the main body with the external device and decoupling the main body from the external device, wherein the attachment shares a center with the main body and is positioned at a center of the main body, and wherein the hanger is apart from the center of the main body by a certain distance and is connected to a side surface of the main body.