This paper presents a novel scheme of laser beacon which employ the FADOF as frequency selecting device. By appling electronic and optical feedback to control beacon system，the stability, reliability and ability of overcoming interferenee of laser beacon could be enhanced. The system could also be initiated automatically. The frequency stability of the laser beacon was better than 5×10-9, and the LD frequency of the system could be stabilized at any peak of FADOF within 30 ms.This scheme could meet the need of novel pointng，aquisition and tracking (PAT) system using FADOF，and will have a big influence in buiding laser communication link betweeen satellite.