A communication management system starts transmission of first image data captured at a first communication terminal to a second communication terminal through a communication session for display at the second communication terminal, and in response to receiving a communication start request for starting communication with the second communication terminal from the first communication terminal, starts transmission of second image data and second audio data respectively captured at the second communication terminal to the first communication terminal, and first audio data captured at the first communication terminal to the second communication terminal, through the communication session, to enable communication between the first communication terminal and the second communication terminal.