Abstract: In this paper, determinate-periodic-task-bas process management for real-time system is studied. A scheduler generating method is developed to manage determinate periodic tasks. Nonperiodic tasks are divided into two classes by the deadline increasing method. The two classes of tasks are managed by interrupt scheduling and signal scheduling. An enhanced maximum urgency first algorithm is also developed for scheduling. the schedulability of the target system, is also studied and the necessary and sufficient condition for the feasibility of the target task set is given.