Photovoltaic (hereafter called PV) Power Generation System (hereafter called The System) is to convert solar energy into electric energy by PV effect principle. Its main parts are solar PV array, convergence box, DC cabinet, inverter and box transformer, which are characterized by high reliability, long service life, non-pollution and independent power grid operation. It is a clean and non-pollution environmentally friendly energy that favored by all over the world's organizations, which has promising development prospects.Photovoltaic power station monitoring is to connect the inverter, combiner box, irradiator, meteorological instrument, electricity meter and other equipment of the photovoltaic power station through data lines, collect the data of these equipment with the photovoltaic power station data collector, and upload them to the network server or local computer through industrial network, It is convenient for power station managers and users to view and manage the operation data of photovoltaic power station. The monitoring of photovoltaic power station can carry out cluster detection and management, which is conducive to data collection, curve generation and data analysis, and save a lot of labor costs.