A message sharing method includes: receiving image data captured via an imaging unit; receiving text input by a user via the input unit; analyzing, by a processor, the text and the image data and extracting a first object related to the user by using at least one of a result of analyzing the text, a result of analyzing the image data, and a sensed value obtained from a sensor unit; editing the image data to further include the extracted first object, and converting the edited image data to a thumbnail format; sharing the converted image data and the text with another user via a chat room.