Task processing method and system

An embodiment of the invention provides a task processing method and system. The method includes: separating a to-be-processed task into multiple sub-tasks, wherein the granularity of one optional sub-task is one of the multiple preset granularities; selecting the first-number task processing nodes from task processing nodes to serve as adopted node groups, respectively distributing the sub-tasks to the task processing nodes, with the task processing capability matched with the granularities of the sub-tasks, in the adopted node group for processing according to the task processing capability records of the task processing nodes in the stored adopted node groups. Due to the fact that the granularities of the tasks to be processed by the task processing nodes are matched with the processing capability of the task processing nodes, the task processing time of the task processing nodes is identical, and the situation that the task processing nodes with high process capability are idle for a long time is avoided. By the method, resource utilization rate and task processing speed are increased effectively.