1. A fire detection method comprising: acquiring RGB data from an image; converting the RGB data into HSL data; correcting the converted HSL data; extracting a fire color region from the corrected HSL data; obtaining the indexes using the RGB data and the corrected HSL data; and determining whether a fire has occurred using the indexes, wherein when all of H, S and L of the HSL data are HIGH, a corresponding pixel is a fire color region and thus is set to HIGH; and when at least one among H, S and L is LOW, a corresponding pixel is set to LOW, and wherein the correcting of the HSL data comprises changing a corresponding pixel from LOW to HIGH when only one among H, S and L is LOW and pixels surrounding the pixel are HIGH.