This paper introduces a lightning vocation system which is based on Wait’s waves propagation theory. The system has only one station, which consists of a BC-5 Digital Waves Storgaer, a H-89 Microcomputer and a Controling Software Package. The system works in high storage speed (Max. 4 MW/sec) with easy changing function (by software) and wide frequency band (100 Hz-200 KHz). It was used to observe VLF spectrum of lightning electromagnic radiation and to locate lightning position