An optical inspection system comprising: - an optical fiber sensor configured to detect a vibration propagating in an inspection target object or a displacement of the inspection target object and to output a first optical signal having a temporal change in a wavelength, the temporal change in the wavelength corresponding to a temporal change in an amplitude of the vibration or a temporal change in the displacement; - an optical filter configured to convert the first optical signal into a second optical signal having a temporal change in an intensity and to output the second optical signal, the temporal change in the intensity corresponding to the temporal change in the wavelength; - a signal processor configured to acquire inspection information on the inspection target object on a basis of the second optical signal; - a corrector configured to correct a correspondence relationship between the temporal change in the wavelength of the first optical signal and the temporal change in the intensity of the second optical signal by changing a wavelength characteristic of the optical filter, the correspondence relationship being directed to converting the first optical signal into the second optical signal, characterized in that the corrector being adapted to change the wavelength characteristic of the optical filter by causing an optical waveguide constituting the optical filter to expand or contract; and - a storage device configured to store various information, wherein the storage device is configured to store information indicating a relationship between a temperature of the inspection target object and an amount of change in the wavelength characteristic of the optical filter, wherein the corrector is configured to change the wavelength characteristic of the optical filter by an amount of change corresponding to the temperature of the inspection target object. - an optical fiber sensor configured to detect a vibration propagating in an inspection target object or a displacement of the inspection target object and to output a first optical signal having a temporal change in a wavelength, the temporal change in the wavelength corresponding to a temporal change in an amplitude of the vibration or a temporal change in the displacement; - an optical filter configured to convert the first optical signal into a second optical signal having a temporal change in an intensity and to output the second optical signal, the temporal change in the intensity corresponding to the temporal change in the wavelength; - a signal processor configured to acquire inspection information on the inspection target object on a basis of the second optical signal; - a corrector configured to correct a correspondence relationship between the temporal change in the wavelength of the first optical signal and the temporal change in the intensity of the second optical signal by changing a wavelength characteristic of the optical filter, the correspondence relationship being directed to converting the first optical signal into the second optical signal, characterized in that the corrector being adapted to change the wavelength characteristic of the optical filter by causing an optical waveguide constituting the optical filter to expand or contract; and - a storage device configured to store various information, wherein the storage device is configured to store information indicating a relationship between a temperature of the inspection target object and an amount of change in the wavelength characteristic of the optical filter,