A floating stereoscopic display device includes a plurality of floating display modules disposed adjacent to each other. Each of the plurality of floating display modules includes an image processor, and the image processor of each of the plurality of floating display modules provides respective stereoscopic image data. The stereoscopic image data provided by each of the image processors is generated in response to different simulated viewing angle ranges of reference image data. Each of the plurality of floating display modules projects a stereoscopic image in a corresponding one of a plurality of stereoscopic display spaces according to the respective stereoscopic image data. The plurality of stereoscopic display spaces are at least partially overlapped to form a stereoscopic imaging space, and the stereoscopic images projected by the plurality of floating display modules in the stereoscopic imaging space are combined to form a floating stereoscopic image.