In this study, the changing trend of product message through telephone ads was analyzed. Analysis results of wire telephone ad, car phone ad, wireless telephone ad, digital camera phone ad, smart phone ad are as following as; The message of telephone ads has been changed with emphasizing on various benefits. A telephone, which has been developed from wire telephone to smart phone, was evolved from the tool of simple communications to the pleasure toy. A telephone, which is representative communication media technology, had a huge impact on changing of communication style in Korean society. This research is significant for pursuing the flow of communication style in sociocultural context by means of analyzing product message through the telephone ads.