The remote control spray system based on the helicopter from German VARIO company was designed. The spray system including the tank, control box, pump, pipeline system, cantilever and centrifugal nozzle were set on un-manned helicopter. The remote control system reserved for aerial spraying was developed. The spraying system can be operated by remote control units. By carrying out the theory research on main influence facts of centrifugal atomizing spray effect and the tests for nozzle performance, the optimal operating parameters of centrifugal atomizing nozzle were obtained, that is, rotary speed of 6000 r/min, flow rate of 48 L/h, VMD of 138.558 μm, and spray swath of 3.42 m.