Disclosed herein is mobile communication terminal for performing a voice-text message conversion process that includes a memory, a voice data detecting unit, a voice-text converting unit, and a controlling unit. The memory stores condition information for the voice-text message conversion process. The memory includes a voice message area for storing voice messages and a text message area for storing text messages. The voice data detecting unit extracts a voice signal from a specific voice message. The voice-text converting unit converts the voice signal to a text message. The controlling unit determines whether the voice-text message conversion process is required for the specific message, based on the condition information, and stores the text message converted by the voice data detecting unit and the voice-text converting unit in the text message area.