The focal point of this thesis is that solar energy only bends over the systematic design and design of complementary system of scene. The design of the solar energy solar cell system is divided into software design and hardware and designed, and software design is prior to the hardware to design. Software design includes: Calculation of the power consumption of load, calculation of radiation quantity the square matrix of the solar cell, calculation of solar cell, battery consumption and optimization design matching each other between the two, install calculation of the inclination, prediction of the systematic running situation and analysis of systematic economic benefits,etc. in square matrix of the solar cell. The hardware is designed and included: The selecting type of load and essential design, the selecting types of solar cell and battery, the design of the solar cell support, go against the selecting type of the becoming device and design, and control, measuring system selecting type and designing. As to the large-scale solar energy solar cell system, bend over the design of the square matrix field of battery, defend earth design of thunder, design and assisting or selecting type of the spare power and designing of distribution system glazedly. Because software design involves the complicated radiation amount of solar energy, installs the design of inclination and system optimization to calculate, generally finished by the computer; Can adopt the method estimated too on condition that require not very strict. Power consuming load situation and resource condition that the complementary electricity generation system of scene can follow users carry on the rational disposition of the systematic capacity, can that security system supply power dependability, can reduce fabrication cost of electricity generation system. No matter what kind of environment and how complementary electricity generation system can systematic design plan optimized most to make come requirement to satisfied with user with require scene by electricity. Should say, the complementary electricity generation system of scene is the most rational independent power system. The solar cell of keyword, the scene takes place complementarily Electricity, solar energy.