The invention provides a road camera-based visibility intelligent estimation method. The method comprises the steps of data collecting, distorted image filtering, and analysis model constructing. In this way, the image features in the region of a road image can be analyzed, and the visibility is estimated. Meanwhile, the method is wide in coverage area, and the equipment cost and the manual cost are reduced. A road camera is fully used for monitoring video images. Therefore, distorted images are filtered, and the visibility value of an image can be measured and calculated. The data distortionproblem, occasionally generated due to the insufficient coverage of a visibility instrument and instrument failure, can be overcome. In addition, the damage problem of the visibility instrument is verified from the other aspect.