Method and system for private network service and gateway therefor

The present invention relates to an independent private network service by separating traffic of the user in the private network service providing method and system for providing to each user. Mobility management entity of forming a session between the private network service system includes a mobile communication terminal APN the gateway and the mobile communication terminal in accordance with the present invention; And a plurality of intranets and connect the respective intranet traffic management, the mobility management entities through the mobile communication terminal and a session is formed, and the mobile communication terminal from the traffic generated when the mobile communication terminal identification information and correspondence determine which private network access interface, and one of the plurality of intranet includes a private gateway to forward traffic for the mobile communication terminal to an intranet that corresponds to the private network access interface.