The invention discloses a radio signal interference source plane space angle orientation system and method; the method comprises the following steps: a USRP device gathers two path radio signals froma radio signal interference source, and converts the two path radio signals into IQ modulation signals; an interference source plane space angle orienting device uses Labview platform software to gather array snapshot data from the two path IQ modulation signals, and uses a MUSIC algorithm to process the snapshot data array so as to obtain a radio signal interference source radio signal space spectrum function PMUSIC; the interference source plane space angle orienting device uses Labview platform software to draw a PMUSIC space spectra of the MUSIC algorithm space spectrum function, and a radio signal generation frequency extreme value can be searched in the PMUSIC space spectra. The method can accurately obtain a signal reception antenna angle with respect to the radio signal interference source.