Abstract: A multi-task framework proposed for PET (positron emission tomography) on the basic principle of real-time system analysis is used to develop PET real-time control system. With the realization of the software part particularly detailed, the system flow chart of the software part is introduced. Then, those mechanic subsystems including scanner bed, rod source, septa and wobble are all verified experimentally that they are available to complete the planned control task and expected motion control precision with stable system operation. Experiment results show the high reliability and real-time response of the proposed PET real-time control system based on multi-task framework.