Apply multi-level lightning prevention control technology, through adopting lightning over-voltage protection, surge protection, equivalent potential connection, shield and other measures for preventing the invasion and damage to the weak current equipment system, thus getting rid of the factor of lightning strike, and lowering the thread of lightning to the lowest level, assuring the normal operation of the weak current system and personal security. The technology has applied widely in WISCO TV Station, 4-Sintering PLC system, Energy General Plant, Cold Rolling and Hot Rolling Self-control workshops, WISCO whole marketing information system and WISCO medicare system, etc.