Abstract: The principle of the dynamic load balance for a distributed system was used to design a preemptive dynamic load balancing architecture to meet require ments of the network distributed and parallel computing environment. A centraliz ed information system was introduced to collect all process's information. A hyb rid transmission control method of combining centralized and distributed logic w as described based on the process migrating. A new load index was particularly d efined for the case to make sure a processor's load level. The corresponding the oretic analysis for the important problems in implementation was discussed. The critical strategies and algorithms were presented. The results of the simulation show that the architecture and related strategies can provide effectively suppo rt to the network parallel computing.