A method for manufacturing a light scanning system includes a process of assembling a plurality of device structures, each of device structures including a mirror device and a magnet, a process of acquiring, for each of device structures, 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, and second data for correcting at least one of a shift of the mirror swinging with a first axis from a Y-axis and a shift of the mirror swinging with a second axis from an X-axis, a process of acquiring, for at least one of device structures, third data for correcting a change in a deflection angle of the mirror with respect to a change in an operating temperature, and a process of storing the first, second, and third data in the storage part.