The master control system is a core part of operation scheduling and centralized management in fusion experiments. With an efficient human-computer interface[2], the master control system monitors the overall system’s running, controls the discharge process, coordinates and synchronizes each sub-module’s operation, achieves second level synchronization within the experimental region, control management database, safety inspection and interlock protection. When the KTX is running, if safety interlock system inspects any problem, process control system will send signals to every sub-system, ban output of the trigger delay signals at all distributed nodes and report fault conditions.