The invention discloses a flight monitoring service method and a 
system thereof. The method is characterized by through a 
black box of a 
low altitude flight aircraft, acquiring a position and flight path information of an unmanned aerial vehicle; after carrying out correlation 
processing, using an unmanned aerial vehicle 
air traffic control system to send 
peripheral flight path information of the unmanned aerial vehicle to an unmanned aerial vehicle 
ground control station. The 
system comprises a 
civil aviation secondary 
radar, a low-altitude 
radar, 
radar access equipment, mobile acquisition equipment, an ADSB 
ground station, mobile conversion equipment, an automatic navigator, a GPS radio 
station, ADSC information conversion equipment, mobile communication equipment, a 
Big Dipper airborne navigator, a flight monitoring 
cloud server and a flight monitoring information application system. The method and the system of the invention have an 
advantage that 
dynamic data of an acquired unmanned aerial vehicle flight path, a state and the like can be taken as a monitoring information source and is transmitted to an 
air traffic control system currently used by military and 
civil aviation in real time so that a management department can conveniently monitor a flight state of a 
low altitude airspace unmanned aerial vehicle, and a blind area of current low-altitude 
spatial domain monitoring is compensated.