To provide a fog removing system capable of removing fog effectively and efficiently by operating a fog removing means provided in a traveling body passage optimaly in accordance with a distribution situation of the fog formed in the traveling body passage and its peripheral part.

The distribution of the fog formed in a traveling body passage and its peripheral part is detected by a fog removing means 4 removing the fog in the vicinity of the traveling body passage and a fog observation means 1 for observing the fog generated in the traveling body passage and its peripheral part based on the results of the observation by the fog observation means 1. A fog distribution detection processing means 2 for predicting the travel of fog based on the results of the detection of the fog distribution and a control means 3 for controlling the removing operation of the fog removing means 4 based on the results of processing by the fog distribution detection processing means 2 are provided.