A method of inspecting a liquid crystal display panel includes providing a liquid crystal display panel to be inspected, turning on a backlight unit that is disposed under the liquid crystal display panel to emit light toward the liquid crystal panel, driving the liquid crystal display panel by applying test signals to the liquid crystal display panel on a predetermined period, detecting defects by taking an image of the liquid crystal display panel on a period shorter than the driving period of the liquid crystal display panel, and detecting defects created in the liquid crystal display panel, which blink in accordance with a period of the test signals of the liquid crystal display panel.