Method and device for acquiring complete real-time data in distributed control system

The invention provides a method and device for acquiring complete real-time data in a distributed control system, and belongs to the technical field of data processing. The method comprises the following steps: constructing a local memory, wherein the local memory is used for caching data of an observation point; acquiring real-time data of an observation point; caching the observation points and real-time data thereof into a local memory; querying historical data capable of complementing history for the real-time data of the observation point from a historical database; and adding the obtained historical data into a local memory to complete the complementary historical operation of the observation point. According to the method, the local memory is constructed, real-time data needing to be observed are directly provided according to actual requirements of operators in the operation process of the distributed control system, and the load of the operators on historical stations when the operators observe the d