A communication system includes: a communication device configured to operate various functions using software programs stored in a software storage unit; a management server device configured to send an updating software program corresponding to one of the software programs; an operation information obtaining unit configured to obtain operation information of the software programs in the communication device; a determination unit configured to determine a software program that needs updating among the software programs based on the operation information obtained by the operation information obtaining unit; and an updating unit configured to replace the software program that is stored in the software storage unit and determined by the determination unit to need updating with the updating software program.