PURPOSE: To attain the efficiency of a task distributing method in a multiprocessor system.

CONSTITUTION: Each task queue Q1-QN has its own task queue characteristic 26-30 affecting each other for processing a related task, and it includes the minimum demand processor equipment constitution, execution priority order of a task in a related queue for the task in another queue, and execution dependency for the task in another queue. Processors P1-P4 in a multiprocessor data processing system 10 are connected with all the task queues Q1-QN, and a task to be processed is selected in a selection sequence decided according to the related task queue characteristic. Therefore, a task is actively fetched and processed from the task queue in the highest priority order at first, and then successively from the task queue in the lower priority order.