Disclosed is an IQ data processing method of a remote radio frequency unit (RRU), the method comprising: when an RRU receives IQ data transmitted by a base band unit (BBU) via a dual-carrier, conducting parallel processing on the IQ data of the dual-carrier; modulating the processed dual-carrier into a radio frequency signal, and outputting the radio frequency signal to an aerial port. Also disclosed are an IQ data processing system, RRU, and computer storage medium.