A distributed data-based concurrent processing by a control terminal obtaining data block information corresponding to a submitted operation; a task processing terminal sending a task processing request to the control terminal; the control terminal finding a data block that is unassigned and is distributed in the same server where the task processing terminal is distributed, and assigning the found data block to the task processing terminal. The control terminal determines a server having the fewest data blocks that are being processed by the task processing terminal and assigning an unassigned data block to the task processing terminal on the determined server if the data block that is unassigned and is distributed in the same server where the task processing terminal is distributed is not found. The task processing terminal processes the data block assigned by the control terminal according to a flow.