Time-dependent crystallization property of thin film amorphous alloys is important because it provides an indication of lifetime of the alloys. We propose a novel and high-throughput method for characterization the property. The method consists of integration of temperature condition and detection of crystallization by a thermography. The integration can be achieved using temperature-gradient heating furnace system which can maintain the heating gradient on thin film sample. Crystallization of the temperature gradient sample can be detected by the thermography as emissivity change in various points at once. The method is demonstrated using two compositions of NiNbZr thin film amorphous alloys integrated on one substrate. Time-temperature-transformation diagrams of crystallization can be obtained by one heating test. Furthermore, activation energy of these alloys can be calculated by the results. Throughput of the proposed method is 3.5 times higher than conventional method and it is possible to reduce characterization time by 72% in the case of the above demonstration.