1. A method of calibrating a multifunctional particle analysis device including a particle measuring device that irradiates particles in an aerosol to be measured with laser light and measures a number and a size of the particles in accordance with scattered light produced when the laser light hits the particles, and a particle composition analysis device in which the particles in the aerosol to be measured are captured using a capturing unit and then irradiated with an energy beam to make the captured particles vaporize, sublimate, or react so as to produce desorption components, the desorption components being analyzed in order to analyze a composition and a mass composition of the particles, the method of calibrating comprising: preparing a plurality of calibration particles of same kind for which at least a number, size, and composition thereof are known; dividing the plurality of calibration particles into two groups of first and second groups; inputting the first group of calibration particles into the particle measuring device and then analyzing the first group of calibration particles by the particle measuring device; at the same time as inputting the first group of calibration particles into the particle measuring device, inputting the second group of calibration particles into the particle composition analysis device and then analyzing the second group of calibration particles in the particle composition analysis device; calibrating a sensitivity of the particle measuring device in accordance with the number and the size of the first group of calibration particles as measured by the particle measuring device; and calibrating the particle composition analysis device in accordance with a property of the second group of calibration particles in the particle composition analysis device.