A light field near-eye display device, comprising a processor, a display panel, and a lens module, wherein the processor is configured to calculate new ray tracing data based on a current eye relief, preset eye relief data, and preset ray tracing data, and to adjust preset image data according to the new ray tracing data to generate adjusted image data; the display panel is coupled to the processor and configured to emit an image beam according to the adjusted image data; and the lens module comprises a microlens array, and the lens module is disposed between the display panel and a pupil, wherein the image beam is incident to the pupil through the lens module and displays a light field image, wherein the preset eye relief data comprises a first preset eye relief, and the preset ray tracing data comprises first preset exit pupil position coordinates, wherein the processor is configured to calculate current exit pupil position coordinates of the new ray tracing data according to the current eye relief (Di), the first preset eye relief (De), and the first preset exit pupil position coordinates, wherein the preset eye relief data further comprises a second preset eye relief (De+ΔDe), and the preset ray tracing data further comprises second preset exit pupil position coordinates, a first preset ray vector, and a second preset ray vector, wherein the processor is configured to calculate a current ray vector of the new ray tracing data according to the current exit pupil position coordinates, the first preset exit pupil position coordinates, the second preset exit pupil position coordinates, the first preset ray vector, and the second preset ray vector, wherein the processor is configured to perform an interpolation calculation according to the current exit pupil position coordinates, the first preset exit pupil position coordinates, the second preset exit pupil position coordinates, the first preset ray vector, and the second preset ray vector, so as to obtain the current ray vector. the processor is configured to calculate new ray tracing data based on a current eye relief, preset eye relief data, and preset ray tracing data, and to adjust preset image data according to the new ray tracing data to generate adjusted image data; the display panel is coupled to the processor and configured to emit an image beam according to the adjusted image data; and the lens module comprises a microlens array, and the lens module is disposed between the display panel and a pupil, wherein the image beam is incident to the pupil through the lens module and displays a light field image, wherein the preset eye relief data comprises a first preset eye relief, and the preset ray tracing data comprises first preset exit pupil position coordinates, wherein the processor is configured to calculate current exit pupil position coordinates of the new ray tracing data according to the current eye relief (Di), the first preset eye relief (De), and the first preset exit pupil position coordinates, wherein the preset eye relief data further comprises a second preset eye relief (De+ΔDe), and the preset ray tracing data further comprises second preset exit pupil position coordinates, a first preset ray vector, and a second preset ray vector, wherein the processor is configured to calculate a current ray vector of the new ray tracing data according to the current exit pupil position coordinates, the first preset exit pupil position coordinates, the second preset exit pupil position coordinates, the first preset ray vector, and the second preset ray vector,