It has been very difficult and inefficient to implement data synchronization in the multimedia information systems until now, because most data synchronizations have been implemented by ad hoc methodologies. In this paper, we propose a new synchroniation methodology implemented by scheduling using monitor. If users definece the temporal relationships of media data using high level user interface, then the monitor selects media data started at that time and controls setup time and precessing time. The scheduler determines the scheduling method or selected media data and adjusts the synchronization among them.