The invention discloses an electric signal-based household appliance single-rotor compressor variable frequency controller and an implementation method thereof. The controller comprises a single-resistor detection circuit, a filter and amplifier circuit, a fault clearance and software filter module, a three-to-two-phase system conversion module, a rotor position determination module, a two-to-three-phase conversion module and a three-phase conduction time fanlike module, wherein the rotor position determination module comprises a parameter input module, a low pass filter module, a current pre-estimation module and a rotor position pre-estimation module. The implementation method comprises the following steps of: (a) detecting the three-phase current of the single-rotor compressor; (b) amplifying an acquired signal and judging the abnormity; (c) converting three-phase voltage into two-phase voltage; (d) pre-estimating the rotor position of the compressor; and (e) controlling the rotor of the compressor to rotate. The controller and the method have the advantages of rapid stabilization of the working condition, stable load, low energy consumption, small noise and the like.