The invention discloses a large-scale million-kilowatt photovoltaic base regional radiation resource monitoring system which mainly comprises a radiation monitoring station, a communication network and a central station, wherein the radiation monitoring station is used for automatically collecting local radiation parameters and local environmental parameters in real time and storing the collected parameters, performing operation and conversion processing on the collected local radiation parameters and local environmental parameters, and sending the radiation monitoring data obtained after operation and conversion processing to the central station through the communication network; the communication network is used for providing a plurality of communication channels for data interaction between the radiation monitoring station and the central station; and the central station is used for reading and receiving the radiation monitoring data sent by the radiation monitoring station through the communication network at regular time, and performing collection, archiving and remote processing. The large-scale million-kilowatt photovoltaic base regional radiation resource monitoring system can overcome the defects of single communication mode and small coverage area in the prior art, so as to achieve the advantages of diverse communication modes and wide coverage area.