The system for measuring distribution of electromagnetic field (EMF) allows to eliminate errors in determining the magnetic and electric fields resulting from voltage fluctuation and phase unbalance of a three-phase electroenergetic system. The idea of the innovation is constant registration of the field intensity and its random variation during the measurement. The movable measuring instrument changes position and is used to measure the intensity of magnetic field at various points. Thus determined values of magnetic field are free of errors related to changes during measurements. The novel system allows for sending results using wireless network to an external measurement/registration devices by installing proper interface. The system can be adjusted with regards to purpose and methodology of electromagnetic field measurements against users’ needs and requirements.