Message distribution system and method

A message distribution system which distributes messages for transmission/reception between mobile terminals (11,15), comprising: a message distribution server (12) which receives a message transmitted from one of the mobile terminals (11) and distributes the message to the mobile terminal (15) on a receiving side; and a library server (13) which includes: a data storage unit (14) storing a plurality of content data corresponding to a keyword; and a control circuit which executes a search to determine matching with the keyword stored in the data storage unit (14) by using a word contained in a body of the message as a key upon a request from one of the message distribution server (12) and the mobile terminal (11); extracts, when the word matches the keyword, all content data corresponding to the keyword from the data storage unit (14), and extract content data similar to predetermined condition information from the extracted content data; and embeds the extracted content data similar to the condition information in the message.