Abstract: A document camera is used for capturing and outputting images of an object to be displayed. The document camera is detachably coupled with a presentation station module and includes a main body, a camera module, a first operating panel and an expansion interface. The camera module is disposed on the main body for capturing the images of the object. The first operating panel is disposed on the main body and operated by a user to control an image-capturing operation of the camera module and an image outputting operation. The expansion interface is disposed on the main body. The functions of the document camera are expanded when the camera module is coupled with the presentation station module via the expansion interface.