The key to solar street lighting project design is the best combination of solar module, storage battery and lighting configuration. After the determination of lighting power, the battery capacity can be easily matched. Since light is impacted greatly by climate and geography, choosing a suitable power solar module is very important. Based on theoretical calculation or meteorological data design method, the calculated capacity of the solar module has large deviation. Based on conventional design methods, the solar module capacity is adjusted to 80 W from calculated 145 W. After continuous real- time tracking and monitoring, the results show that the design meets the design requirements, reduces system cost and saves the use of space.