This paper focuses on solar photovoltaic system design and scenery complementary system design. Photovoltaic power generation system design software design and hardware design, software design and hardware design in the first. Software design include : load consumption, solar cell array of surface radiation, solar cells, Battery amount of calculation and mutual match between the optimum design, solar array installation inclination, operation of the system of forecasting and system cost-effective analysis. Hardware design, including : the selection and load the necessary design, solar batteries and battery selection, Solar battery stent design, the inverter selection and design, and control, measurement system selection and design. For large-scale solar photovoltaic power generation system, we should also have the PV array market design, mine grounding design, distribution system design and support or reserve power supply selection and design. Due to a software design involves complex solar radiation, installation and system optimization angle design, is usually completed by the computer; In less stringent requirements circumstances, it can take estimation approach. Sightseeing complementary generating system users can load and resource conditions of system capacity in the rational allocation can guarantee the reliability of electricity supply systems, and can also lower the cost of power generation system. No matter what the environment is and how the electricity requirements, Sightseeing power system can make optimal system design programs to meet the user's requirements. It should be said that the scenery complementary generating system is the most reasonable independent power supply system.