An electronic device which schedules a plurality of tasks, and an operating method thereof. The electronic device includes a processor and a memory operatively connected to the processor, and when being executed, the memory stores instructions that cause the processor to: detect occurrence of an interrupt requesting performance of a second task while performing a first task; obtain reference values according to a time of the first task, and reference values according to a time of the second task; schedule the first task and the second task based on a reference value of the first task and a reference value of the second task which correspond to a time at which the interrupt occurs; and process the first task and the second task based on a result of the scheduling. Other embodiments are possible.