Disclosed are a method for measuring temperature distribution, which measures temperature distribution not only in fat tissue but also in mixed tissue containing high-water content tissue and fat tissue, and a method for imaging temperature distribution. In the disclosed method, a water signal, which is dependent on the water components of the tissue to be measured, and a fat signal, which is dependent on the fat components of the tissue to be measured, are acquired by means of nuclear magnetic resonance spectroscopy. Fatty acid signals are acquired by separating out the fat signal into various fatty acid components. The temperature of high-water content tissue is measured on the basis of the correlation between the water signal and the water temperature, and the temperature of fat tissue is measured on the basis of the correlation between each of the various fatty acid signals and the fat temperature.
