Abstract: Although the algorithms for speech processing are plentiful，there are few visualization software platforms which can be used to testify or design some specific algorithms.In this paper，a system platform used for extracting and indicating the time-spectral features of speech signal is designed under the environment of MATLAB GUI.On this platform，the user can load and play the speech signal in different audio formats.Especially，Linear Prediction Cepstrum Coefficient（LPCC） and Mel-Frequency Cepstrum Coefficient（MFCC），which are the two main feature parameters for speech recognition system，can be calculated，saved and displayed on the same panel.The system interface is friendly，as well as it is convenient and interactive for operating.The simulation results demonstrate the accuracy of the background algorithms for time-frequency features extracting.The designed system will provide important and intuitive auxiliary effect on verifying the algorithms and data processing efficiency for the research fields related to speech signal processing.