There are a number of voiceanalysis programs around the world. Domestic voiceanalysis is performed by relying heavily on specific commercial program. We intend to develop coding for voiceanalysis using Praat and apply it to clinical practice. This study consisted of Experiment 1 and Experiment 2. Experiment 1 was the development of automated voiceanalysiscoding based on Praat. The coding was largely divided into a recording, an analysis, and a storage section. Experiment 2 was applied to the voiceanalysis of 2 malepatients pre- and post-operation with this coding. The analysisparameters of this coding provided 26 parameters for vowel /a/, nine parameters for sentence analysis, and a total of 4 parameters for voice range profile analysis. In two malepatients, the pitch and the intensity increased, the voice quality improved, and the sentence length decreased after surgery. The coding was well made, so the output was good in real time. The code is automated as much as possible to block manual errors and increases convenience and efficiency by generating the result sheet in real time.