A method for making settings for a laser processing apparatus, the laser processing apparatus being adapted to input fundamental-wave laser light to a wavelength conversion device for directing, to a to-be-processed surface, higher-harmonic-wave laser light with a harmonic wavelength of a higher order than the wavelength of the fundamental-wave laser light for performing desired processing thereon, the method comprising the steps of:
- controlling a temperature adjustment section for adjusting the temperature of the wavelength conversion device for changing the temperature of the wavelength conversion device within a predetermined range and executing temperature searching for measuring the power of the laser light emitted from the wavelength conversion device at each temperature;
- and
- setting the maximum laser power value and the temperature of the wavelength conversion device at the time when the laser power had a maximum value as a result of the temperature searching, as an optimum temperature of the wavelength conversion device.