1. An apparatus for managing tasks in an industrial plant, comprising: a task generator for generating at least one task to be performed in the industrial plant; a task scheduler for assigning a priority to the at least one task by analyzing information of the plant; and a communication module for exchanging task information with a mobile device, wherein the task scheduler analyses information of the industrial plant by checking priority of an abnormality detected in the industrial plant, checking priority of an equipment associated with the abnormality, and checking maintenance historical data associated with the equipment, wherein the at least one task further comprises a plurality of routine tasks, and wherein the task information comprises the priority of each of the routine tasks.