Power test system and method of radio frequency transmitter

The present invention provides a power test system and method. The system includes: an attenuator, a power detector, an amplifier, a comparator and a single-chip microcomputer. The method includes: first providing a wireless communication device in a transmitting mode to generate intermittent modulated high-frequency signal inputted into the attenuator to attenuate the high-frequency signal and produce attenuated signal; then inputting the attenuated signal into the power detector for being converted into voltage signal; inputting the voltage signal into the amplifier for generating amplified voltage signal; further inputting the amplified voltage signal into the comparator and providing a programmable standard voltage source controlled by the single-chip microcomputer for being inputted into the comparator to compare the voltage level of the amplified voltage signal with that of the standard voltage; and inputting the comparison result into the single-chip microcomputer for analyzing and determining whether