The invention particularly relates to a photovoltaic power station state monitoring device based on wireless. The device comprises a first power module, a second power module, an RS485 level conversion module, a master control module, a GPRS/CDMA network module, a storage module and a watchdog module. Photovoltaic power station system information is collected by a data acquisition module through an RS485 bus, meanwhile, the state of an inverter and the state of a network are checked by a state monitoring module, different sending strategies are adopted by a data forwarding module according to the state of the inverter and the state of the network of the device, so that the integrity of data is guaranteed, and network flow is reduced. According to the photovoltaic power station state monitoring device, the wireless technology is used, compared with a traditional wired monitoring device, wiring cost and mounting cost are greatly lowered, meanwhile, compared with an existing mode that GPRS data transmission nodes are adopted, the reliability is greatly enhanced, the photovoltaic power station state monitoring device is more suitable for long-term outdoor working environments, transmission data are also extremely reduced, and network cost is saved.