Analyzed the voice of Bo-gum Park in order to solve the curiosity about the voice of the actor Park Bo-gum voice that appeared in Korean drama 'Gurmigreen Moonlight'. The secret of his popularity was not only his role but also his appearance, but his voice was as charming as he was. According to the production team, he gave his gentle voice as well as a good impression as one reason why Bo-Gum Park was able to adapt to a gentle casting. It has a vocal cord vibration frequency characteristic that can transmit a stable black voice to a viewer, and it has a voice characteristic that speaks with a pronounced and slow speed at each syllable. In addition, he maintains a constant tone at the same sound pressure, and changes the tone of his voice before the rest of the sentence. Especially, the nose due to the big nose added a smooth and soft voice, so that it could appeal to the viewers and fulfill the role as the hero. This study will be the first study to confirm how the fitness of various characters in drama affects the completeness of drama.