Provided are a microprocessor based on event-processing instruction set and an event-processing method using the same. The microprocessor includes an event register controlling an event according to an event-processing instruction set provided in an instruction set architecture (ISA) and an event controller transmitting externally generated events into the microprocessor. Therefore, the microprocessor may be useful to reduce its unnecessary power consumption by suspending the execution of its program when an instruction decoded to execute the program is an event-processing instruction, and also to cut off its unnecessary power consumption that is caused for an interrupt delay period since the program of the microprocessor may be executed again by immediately re-running the microprocessor with the operation of the event register and the event controller when external events are generated.