Based on the Angstrom-Prescott (A-P) equation and sunshine duration data of 122 national meteorological observation stations in Shandong, the daily total solar radiation is estimated, and the error and spatial differences in Shandong are discussed by comparing it with ECMWF（European Centre for Medium-Range Weather Forecasts） Reanalysis v5 (ERA5) data and Himawari-8 satellite radiation product after system deviation correction. The results are as follows. (1) The corrected total solar radiation of Himawari-8 satellite has the smallest error with the observations, and the error is stable under different weather conditions. The error between the total solar radiation estimated by the A-P equation and the observations is close to that between ERA5 and the observations, and the error of the two sets of data is larger as more cloud covers. The A-P equation estimate performs well on sunny days, while ERA5 data performs well on cloudy days. (2) Compared with the total solar radiation distribution of Himawari-8 satellite, the A-P equation estimate is mainly lower in the west of Shandong, and generally lower in the whole province in summer. The total solar radiation of ERA5 data is usually higher in the low-value area and lower in the high-value area, and it is obviously higher in Weihai. (3) For the total solar radiation in Shandong, the accuracy of Himawari-8 satellite data is the highest.