Communication methods across social networks, network elements and systems

The present invention relates to a method of communication across social networks, systems and network elements, the method comprising: receiving a media gateway across social networks social network message sent by a sender, the message carries media recipient user identification information; the across social network gateway acquires the identification information corresponding to the recipient's social network based on the user identification information of the recipient; across the social network gateway forwards to the receiver identification information of the social network of the social network of the recipient media messages. The present invention is different social network users to communicate with each other, improving the user experience.