Disclosed is a wireless temperature measurement apparatus using a SAW device which calculates a temperature by detecting a change in resonance frequency, the resonance frequency being physically changed by a temperature. The apparatus includes: a surface acoustic wave (SAW) device including an inter-digital transducer (IDT) generating a surface acoustic wave and a reflector reflecting the surface acoustic wave and outputting the wave to an antenna, wherein the surface acoustic wave is physically deformed by a temperature change, and a reader generating a transmitting signal within a set frequency band and transmitting the signal to the SAW device, detecting an amplified resonance frequency signal which matches a deformed surface acoustic wave, the deformed surface acoustic wave being one of the reflected waves and being physically deformed by the temperature change, and detecting a temperature of the SAW device by comparing the amplified resonance frequency with a preset frequency.