A light scanning system comprising: a mirror device having a first movable part provided with a mirror and a first drive coil, a second movable part provided with a second drive coil, the second movable part supporting the first movable part so that the mirror is allowed to swing with a first axis along an X-axis as a central axis, and a support supporting the second movable part so that the mirror is allowed to swing with a second axis along a Y-axis intersecting the X-axis as a central axis; a magnet configured to generate a magnetic field to act on the first drive coil and the second drive coil; a temperature sensor configured to measure an operating temperature of the mirror device and the magnet; and an arithmetic part configured to input a first current signal for swinging the mirror at a first target deflection angle and a first target frequency with the X-axis as a central axis to the first drive coil, and input a second current signal for swinging the mirror at a second target deflection angle and a second target frequency with the Y-axis as a central axis to the second drive coil, wherein the arithmetic part acquires the first target deflection angle and the first target frequency, and the second target deflection angle and the second target frequency, acquires the operating temperature from the temperature sensor, and generates the first current signal and the second current signal based on the first target deflection angle and the first target frequency, the second target deflection angle and the second target frequency, the operating temperature, first data for correcting a change in a deflection angle of the mirror with respect to a change in a frequency of a current signal input to each of the first drive coil and the second drive coil, second data for correcting at least one of a shift of the mirror swinging with the first axis as a central axis from the Y-axis and a shift of the mirror swinging with the second axis as a central axis from the X-axis, and third data for correcting a change in a deflection angle of the mirror with respect to a change in the operating temperature. a mirror device having a first movable part provided with a mirror and a first drive coil, a second movable part provided with a second drive coil, the second movable part supporting the first movable part so that the mirror is allowed to swing with a first axis along an X-axis as a central axis, and a support supporting the second movable part so that the mirror is allowed to swing with a second axis along a Y-axis intersecting the X-axis as a central axis; a magnet configured to generate a magnetic field to act on the first drive coil and the second drive coil; a temperature sensor configured to measure an operating temperature of the mirror device and the magnet; and an arithmetic part configured to input a first current signal for swinging the mirror at a first target deflection angle and a first target frequency with the X-axis as a central axis to the first drive coil, and input a second current signal for swinging the mirror at a second target deflection angle and a second target frequency with the Y-axis as a central axis to the second drive coil, wherein the arithmetic part acquires the first target deflection angle and the first target frequency, and the second target deflection angle and the second target frequency, acquires the operating temperature from the temperature sensor, and generates the first current signal and the second current signal based on the first target deflection angle and the first target frequency, the second target deflection angle and the second target frequency, the operating temperature, first data for correcting a change in a deflection angle of the mirror with respect to a change in a frequency of a current signal input to each of the first drive coil and the second drive coil, second data for correcting at least one of a shift of the mirror swinging with the first axis as a central axis from the Y-axis and a shift of the mirror swinging with the second axis as a central axis from the X-axis, and third data for correcting a change in a deflection angle of the mirror with respect to a change in the operating temperature.