Abstract: For photovoltaic power station traditional operational way workers labor intensity, low operational efficiency, operational cost is higher problem, intelligent operational key technology of photo voltaic power station, through the analysis of photo voltaic power station intelligent operational function requirements, put forward the sensor depth fusion of photo voltaic power station online monitoring system, set up the intelligent operations online monitoring system scheme. The hardware system design and software programming have been completed, and the online monitoring of all the photo voltaic power station equipment has been realized. After field installation in a photo voltaic power station and debugging shows that photo voltaic power station online monitoring system for online monitoring of power plant equipment parameters, real-time data transmission, reduce the field equipment maintenance cost and workers labor intensity, using the graph show current and voltage change trend, so as to realize the online monitoring of photo voltaic power station, improve the overall performance of photo voltaic power station, for late photo voltaic power station unmanned inspection and intelligent operations provide application reference.