The invention discloses a system used for detecting uplink interference of an electric power wireless private network as well as a method and belongs to the field of wireless communication. The systemdisclosed by the invention comprises a frequency sweeper used for wireless communication as well as a frequency sweeping analysis module and a wireless receiving antenna which run on a PC side; the frequency sweeper comprises a pre-amplifier, an attenuator, a distributed element filter, a superheterohyne receiver, an analog-to-digital converter, an FPGA module, a DSP module and a micro control unit (MCU); and the frequency sweeping analysis module controls and sets up parameters according to different test tasks set by the PC side and issues an instruction to the frequency sweeper, a packageddata flow uploaded by the frequency sweeper is processed, an I/Q data flow is formed, the I/Q data flow is transmitted back to the PC side after being processed, and frequency sweeping test data is displayed on a software interface of the PC side. The system disclosed by the invention is applied to drive test tools in network planning and network optimization stages of the electric power wirelessprivate network, supports a network coverage test and an interference location test and provides a support for construction of the electric power wireless private network.