A method and system for transmitting a plurality of ESG data to an MS over a communication network in a DVB-H CBMS portable broadcasting service are provided. The MS requests ESG data over the communication network, a server collects the requested ESG data and transmits at least one of the collected ESG data in an ESG data group file to the MS over the communication network. The MS receives the ESG data group file and stores the ESG data included in the ESG data group file.