In recent years, with the vigorous support of national policies, photovoltaic industry as a strategic emerging industry has been greatly developed. The current situation of photovoltaic power generation and power generation forecasting have increasingly become the focus of research. Based on the photovoltaic power generation data of Shaoxing area in Zhejiang Province since 2017, the influence of different factors such as season, weather,temperature and light on photovoltaic power generation efficiency is analyzed. A method of short-term photovoltaic power generation and power generation measurement is proposed, which provides a basis for local distributed photovoltaic power generation forecasting, photovoltaic project location, photovoltaic operation and maintenance management.