Method and device for monitering of multi sessions in wireless communication systems

The invention, in a wireless communication system performing group communication, at the same time as a method and apparatus for monitoring a multisession including a number of individual calls and group calls, receiving a request message for a monitoring set up from the intermediate portion the user terminal and managing the sessions associated with each user, and determine the associated monitoring and up the session and the session of the voice message received relaying a voice message received from the session, from the respective session the control unit that the associated , transmits a voice message received in accordance with the check result, and adds the character conversion and the voice message session is inactive, and when the monitoring method of the session is set to the character and characterized in that it converts the voice message into text form.