A wireless X-ray fluoroscopic imaging system is provided. The system includes an X-ray generation unit configured to perform X-ray exposure for each frame of imaging; a sensor unit configured to output image data; and an image processing unit configured to designate the exposure, wherein the sensor unit includes a first counter configured to be reset and resume counting in response to a beacon signal, and a unit configured to save a readout trigger offset for readout, and starts the readout when a counter value of the first counter matches the readout trigger offset, and the image processing unit includes a second counter configured to be reset and resume counting in response to the beacon signal, and a unit configured to save an exposure trigger offset for the exposure, and starts the exposure when a counter value of the second counter matches the exposure trigger offset.