Abstract: Considering the situation of information security and business requirement,people browse and deal information on local area network which is logical isolated or physical isolated with each other,but people don’t want to lose the powerful data handling ability.Through data transmission and synchronization,to simulate wide area network and avoid information silo is a feasibility choice.This paper provided a task driven data transmission and synchronization method based on XML.This method analyzes data transmission scene,sets the data template of task and task result and recurs to specific information system to build task data package and task result package automatically.It transfers data by data disk,and synchronizes data by data addressing,location and import.By this data passageway,the isolated information systems are interconnected,and people deal with information just like on wide area network.This method enhances the security level of information system,reduces the cost of network line,solves the information silo caused by disconnection,and satisfies the requirements to use network of specific trade.

Key words: Local area network,Data transmission and synchronization,XML,Task driven,Data template