This system has comprehensive functions and can use different operation modes to manage conference discussions according to the different requirements of users. It can be connected to a computer for operation or can work independently from a computer. The system control mode is selected by the host panel: computer control mode and host control mode. The power of the host computer is 100W. A single host can carry 60 sets of delegate/chairman units, and the communication capacity of a single host plus expansion can reach up to 240 units.