The present invention provides a method of communicating and disclosing feelings of a mobile terminal user and communication system thereof, by which a user's feeling state can be delivered to a counter party by real time as well as voice, video, characters, text, and the like are transmitted/received. The present invention includes collecting bio-information of a mobile terminal user, generating feeling data indicating a feeling of the user using the bio-information, and transmitting the generated feeling data with a communication signal.