Example embodiments of the present invention include a communication management system, which stores, for each one of one or more values of quality parameter of content data, an additional charge fee to be added to a basic charge fee for providing a service to transmit content data having the value of quality parameter, receives a request for changing the quality parameter of content data from a currently set value to a value selected by a user at a communication terminal, obtains an additional charge fee associated with the selected value of quality parameter from the memory, and calculates an updated charge fee for transmitting content data having the selected value of quality parameter based on the obtained additional charge fee, and transmits the updated charge fee to the communication terminal for display to the user.