【Objective】Analyze the temporal and spatial characteristics and influencing factors of ET0 in Shandong Province.【Method】Daily climatic data in 24 meteorological stations were used to calculate ET0 by FAO-56 Penman-Monteith equation. In addition, statistical analysis and inverse distance weighted interpolation of Arc GIS were applied to quantitative analysis and qualitative analysis of the spatial-temporal characteristics of ET0.【Result】Over 1961—2011, the average ET0 was 1 161 mm in Shandong province, which...