Abstract:With the continuing development of modern electronic technology, usage and networking of a large number of sophisticated electronic equipments, the protection of lightning rod on those electronic equipments become powerless. The lightning rod cannot prevent the lightning from inducing overvoltage, operating overvoltage and also the invasion of overvoltage. However, the overvoltage is the culprit in damaging a large number of electronic devices. Based on this situation, the intelligent systems must have lightning prevention.