The invention discloses an on-site carrier signal intensity debug method of a power system. The on-site carrier signal intensity debug method of the power system comprises an upper computer and a plurality of handsets. Each handset comprises an OFDM encoding/decoding module. The upper computer comprises a link module, a receiving signal intensity measuring module, a link management module and a touch control panel, wherein the link module is used for downloading a downlink data set DLF from the OFDM encoding/decoding modules or uploading an uplink data set ULF to the OFDM encoding/decoding modules; the receiving signal intensity measuring module is used for measuring the receiving signal intensity value RS1 of the downlink data set DLF; the link management module is used for generating modulation encoding data according to the downlink data set DLF and the receiving signal intensity value RS1; the touch control panel is used for manually sensing the waveform signal intensity value of carrier signals obtained for adjustment in a touch control mode for a user. The on-site carrier signal intensity debug method of the power system can be carried by a power management department or a test department and has the expansibility with multiple interfaces, multiple power information handsets can be pulled out to be used by maintenance personnel on site, carrier signal data are analyzed quantitatively and qualitatively, and debugging is convenient.