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: inputting calibration particles for which at least a number, size, and composition thereof are known into the particle measuring device and the particle composition analysis device and then analyzing the calibration particles; calibrating a sensitivity of the particle measuring device in accordance with the number and the size of the calibration particles as measured by the particle measuring device; and calibrating a sensitivity of the particle composition analysis device in accordance with a mass composition of the calibration particles as measured by the particle composition analysis device.