In the industrial and factory when the electronic and machinery instruments are working the huge electromagnetic interference (EMI) would be generated by them which are big deal to the main disturbance of wireless communication. So the measurement of EMI is quite useful and important for electromagnetic compatibility (EMC). The main goal of my paper is analysis in which bandwidth of EMI influences to wireless communication system in the industrial and factory generated by working arc-welding instrument and moped. The method is used the traditional and classic statistical methodology to identify the strength of electromagnetic field.