Aggregation grid enables all grid nodes connected with a hierarchical architecture into a world-wide grid which can provide all services to all grid nodes for anyone who visits any grid node in the aggregation grid. Once users submit service requests anywhere, the aggregation grid would find the service regardless of where the service is, and will provide the service to users? desktop. Service discovery is fast through lookup service snapshot, aggregation path table and aggregation route table, can find the best service provider through man-made response latency, and is safe through agent aggregation node?s symmetrical password. The grid channel, which is very safeguarded by authentication of the display, the borrower node?s public key for encryption, the lender node?s public key for encryption, the grid channel?s symmetrical password, directly connects users and services in order to cut down transfer time.