PURPOSE: To provide the facsimile communication system which can report a caller and can report the degree of importance for an incoming call as well when the call is incoming.

CONSTITUTION: In the facsimile communication system provided with a G4 facsimile equipment 20 connected to an ISDN line 10 and a key telephone system 40, an exclusive terminal 30 provided with a data base 32 for storing the information of a facsimile transmission source and the telephone set of a call incoming destination corresponding to this information is provided between the facsimile equipment 20 and the main device of the key telephone system 40 and concerning such a facsimile communication system, when the call is incoming to the facsimile equipment 20, the information is displayed at the display part of a key telephone system telephone set concerning the receiving destination stored in the data base 32.