To reduce carbon emissions and achieve energy transition targets, the Chinese government promotes photovoltaic installation, and the PV cumulative capacity ranks first worldwide. These photovoltaic arrays occupy large areas, change the appearance of the landscape, and affect the surrounding residents. The Yangtze River Delta region is characterized by high urbanization, high-density population, and fragmented ecosystems. The region is especially sensitive to the change of landscape caused by photovoltaic development. This paper tracks the landscape changes and impacts caused by 301 largescale photovoltaic power stations each over 6 MW with a set of indexes developed through literature review. The results reveal the development trends, spatiotemporal distribution, and cumulative impacts on landscape protection areas and landscape areas of everyday life, through ArcGIS 10.6 and R, with the data of Landsat 8 and the identification of photovoltaic power stations boundaries. The conclusion enlightens the landscape impact trend of large-scale photovoltaic power stations and triggers thinking about landscape protection when promoting energy transition.