At an actual reception counter, a person in charge of reception can see looks and belongings of a visitor, and may guess a business of the visitor before the visitor reaches the reception counter. However, in communication between communication terminals, there is a problem about usability such that contents on one side cannot be confirmed on a communication terminal on the other side before requesting for communication. To solve the problem, the session control unit 58 of a management system 50 executes, when communication has been established between one or more communication terminals 10 on a customer side and communication terminals 10 on an operator side, control for starting transmission of content data of the communication terminals 10 on the customer side to the communication terminals 10 on the operator side. Based on a start command from the terminal 10 on the operator side, the session control unit 58 of the management system 50 executes control for starting transmission of content data of the communication terminals 10 on the customer side.