Member managing method for multiplex tree structure, service systerm and method using teherof

The present invention relates to a method and a system on the community establishing capable of forming a virtual network Family (Family Network) between the members in a virtual space, through which perform the member management as a member separate virtual space. Multiple multi-tree structure member management method according to the invention in a virtual space a plurality of independent groups including one or more members are formed, the group performing the administrator function, such as individual members managed in the management and the group of the group located in the topmost Route master members and, at least one bridge member which is located in the lower root of the master member, and is configured to include at least one or more members of a member to position the sub-root of the bridge member, the master member, the bridge member and the member members is being formed at it said bear mutually perpendicular relation to the multi-tree structure, interrelated master member, the bridge member and the members belonging to the membership information between the member members in the group are mutually shared, and records them in a predetermined shared database in a virtual space, stores the information for a simultaneous action of a group member It characterized in that the update was shared.