1. A method for predicting and debugging electromagnetic interference (EMI) characteristics of an integrated circuit (IC) system, comprising: selecting a frequency domain range for a processing unit according to transformed raw data of the IC system to generate a blocking frequency analysis result, wherein the transformed raw data are transformed by a time-frequency waveform transformation; setting criteria data to the processing unit; utilizing the processing unit to compare the blocking frequency analysis result with the criteria data to generate at least one comparison result, the step of wherein the step of comparing the blocking frequency analysis result with the criteria data comprises: the step of comparing the blocking frequency analysis result with the criteria data comprises: comparing a peak frequency of the blocking frequency analysis result with the criteria data to generate a first comparison result; and comparing a broad band amplitude of the blocking frequency analysis result with the criteria data to generate a second comparison result; and the pass analysis report is generated when the processing unit determines that the first comparison result and the second comparison result are passed; and utilizing the processing unit to generate a pass analysis report when the processing unit determines that each comparison result is passed; otherwise, utilizing the processing unit to execute an EMI design time-frequency analysis.