An optical measurement system comprising: a Fabry-Perot interference filter having a pair of mirror portions (35, 36) facing each other via a gap, a distance between the pair of mirror portions changing according to a potential difference generated between the pair of mirror portions (35, 36); a light detection unit detecting light transmitted through the Fabry-Perot interference filter; and a control unit controlling the potential difference generated between the pair of mirror portions (35, 36) and acquiring an electric signal output from the light detection unit, wherein the control unit includes: a voltage control unit allowing a set potential difference to be generated between the pair of mirror portions (35, 36) according to a wavelength of light to be measured such that a wavelength of light transmitted through the Fabry-Perot interference filter becomes the wavelength of the light to be measured; and a signal acquisition unit acquiring the electric signal in a state where the voltage control unit allows the set potential difference to be generated between the pair of mirror portions (35, 36), and wherein the optical measurement system is characterized in that the voltage control unit allows the potential difference generated between the pair of mirror portions (35, 36) to gradually increase until the potential difference reaches the set potential difference in a period before an acquisition of the electric signal for a measurement is started by the signal acquisition unit, the period being before the potential difference generated between a pair of mirror portions (35, 36) reaches the set potential difference. a Fabry-Perot interference filter having a pair of mirror portions (35, 36) facing each other via a gap, a distance between the pair of mirror portions changing according to a potential difference generated between the pair of mirror portions (35, 36); a light detection unit detecting light transmitted through the Fabry-Perot interference filter; and a control unit controlling the potential difference generated between the pair of mirror portions (35, 36) and acquiring an electric signal output from the light detection unit, wherein the control unit includes: a voltage control unit allowing a set potential difference to be generated between the pair of mirror portions (35, 36) according to a wavelength of light to be measured such that a wavelength of light transmitted through the Fabry-Perot interference filter becomes the wavelength of the light to be measured; and a signal acquisition unit acquiring the electric signal in a state where the voltage control unit allows the set potential difference to be generated between the pair of mirror portions (35, 36), and a voltage control unit allowing a set potential difference to be generated between the pair of mirror portions (35, 36) according to a wavelength of light to be measured such that a wavelength of light transmitted through the Fabry-Perot interference filter becomes the wavelength of the light to be measured; and a signal acquisition unit acquiring the electric signal in a state where the voltage control unit allows the set potential difference to be generated between the pair of mirror portions (35, 36), and wherein the optical measurement system is characterized in that the voltage control unit allows the potential difference generated between the pair of mirror portions (35, 36) to gradually increase until the potential difference reaches the set potential difference in a period before an acquisition of the electric signal for a measurement is started by the signal acquisition unit, the period being before the potential difference generated between a pair of mirror portions (35, 36) reaches the set potential difference.