Disclosed is a mobile communication terminal capable of speech recognition that includes a speech processing unit, a speech recognizing unit, a speech information managing database and a control unit, and method for utilizing same. A speech signal is modulated by the speech processing unit and converted into speech data for the speech recognizing unit to recognize and to output corresponding speech information. The speech information managing database includes a table storing character information corresponding to the speech information. The control unit recognizes speech through the speech recognizing unit upon a demand for character input by speech recognition in a character input mode, detects character information corresponding to the recognized speech information, recognizes whether detected corresponding character information is input and displays via a display unit the input character information.