Provided are an X-ray imaging apparatus, an X-ray detector, and an X-ray imaging system. The X-ray imaging apparatus includes: an X-ray radiation device configured to emit X-rays； a receptor into which a first X-ray detector configured to detect the emitted X-rays is inserted； an X-ray detector sensing interface configured to detect whether the first X-ray detector has been inserted into the receptor, acquire first identification information of the first X-ray detector inserted into the receptor, and generate first position information indicating that the first X-ray detector has been inserted into the receptor； an output interface configured to output information about the first X-ray detector； and a controller configured to control the output interface to output the first position information and the first identification information, wherein the first identification information is identification information set by a workstation of an X-ray imaging system including the X-ray imaging apparatus.
