A method for measuring a magnetic nanometer temperature in a triangular wave excitation field comprises: (1) placing a magnetic nanometer sample in a position where an object to be measured is located (2) applying a triangular wave excitation field in a region where the magnetic nanometer sample is located (3) detecting a triangular wave excitation field-time curve and a magnetization intensity-time curve of a magnetic nanometer particle sample (4) obtaining a magnetization intensity curve of the magnetic nanometer particles according to a triangular wave excitation field curve and a magnetization intensity curve, that is, an excitation field-magnetization intensity curve, and sampling the curve to obtain a magnetization intensity Mi of the magnetic nanometer particle sample and (5) performing curve fitting by using an excitation field Hi as an input, using the magnetization intensity Mi as an output and using a relationship between the excitation field and the magnetization intensity as a target function, so as to determine a temperature of the object to be measured. In the method, based on a temperature measurement model in a direct-current magnetic field of magnetic nanometer particles, a magnetization curve of the magnetic nanometer particles is rapidly obtained by using a triangular wave excitation field and in combination with an inversion algorithm, the temperature of the magnetic nanometer particles is precisely measured in real time.Linvention concerne un procédé pour mesurer une température nanométrique magnétique dans un champ dexcitation donde triangulaire, qui consiste : (1) à placer un échantillon nanométrique magnétique dans une position dans laquelle est situé un objet à mesurer (2) à appliquer un champ dexcitation donde triangulaire dans une région dans laquelle est situé léchantillon nanométrique magnétique (3) à détecter une courbe temps-champ dexcitation donde triangulaire et une courbe temps-intensité de magnétisation dun échantillon de partic
