원래 이름 기록: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Disclosed is a motion detection device and method using Earth's magnetic field. The motion detection device using the Earth's magnetic field comprises a geomagnetic field sensor, a processor, and a memory operatively connected to the processor, wherein the memory stores instructions and when executed, enable the processor: to identify a first geomagnetic field data using the geomagnetic field sensor, based on the motion detection device that is not moving; to identify that the first geomagnetic field data is generated from a first exercise equipment that is moving; and to identify at least one of a type of exercise and a number of times (e.g., reps, sets) of the exercise using the first exercise equipment based on the first geomagnetic field data