Axion Dark Matter eXperiment (ADMX) uses haloscopes to search QCD axions as dark matter candidate. In this talk, I will review our experiment and introduce 'Y-factor + signal-to-noise-ratio-increase (SNRI) method' for our noise temperature calibration. Then I will discuss the on-going investigation on the abnormal noise temperature estimations appear in our five-month Run1c-extended data.