A real-time data processing method and an apparatus thereof are provided. The method includes collecting real-time data received by one or more nodes in a distributed system; aggregating real-time data that satisfies a same predetermined condition on all the nodes to obtain a total amount of real-time data corresponding to the same predetermined condition, wherein the predetermined condition is used for representing a time at which the real-time data is collected; and calculating a degree of completeness of the real-time data that satisfies the same predetermined condition, wherein the degree of completeness is used for indicating a ratio between processed real-time data that satisfies the same predetermined conditions and the real-time data aggregated on all the nodes. Using the present disclosure, problems caused by failing to know a progress of real-time data processing in existing technologies are resolved, thereby adding a dimension of evaluation of the real-time data processing.