Creep deformation is one of the most critical failure modes in materials, especially for high temperature applications. Acoustic emission is a promising non-destructive evaluation technique for detecting creep damage, but it generates a large amount of data, including background noise and experimental variables, making it difficult to extract useful information. Therefore, this paper was aimed to understand the creep behaviour in stainless steel SS304 through acoustic emission (AE) approach. In this study, a creep test was performed in elevated temperature 700 °C with a loading condition of 70% and 90% of its material yield strength. During the test, AE signal was collected and then analyzed using AE basic parameters and Fast Fourier Transform (FFT) analysis. Based on the results, it was found that the range of FFTA value for stage 2 from 0 to 2.80 x 10−2 mV, Stage 1 from 2.81 x 10−2 mV to 4.68 x 10−2 mV and Stage 3 from 4.69 x 10−2 mV to 1.58 x 10−1 mV. The results demonstrate that the proposed approach effectively identifies the three stages and trends in the creep behaviour of the material. The benefit should be significant to improve the ability to distinguish between different types of creep defects and show the progression of defects.