The ERA5 reanalysis data is introduced firstly, then the conventional observation data from 10 meteorological stations in Shandong province and its surrounding areas are compared with ERA5 reanalysis for the verification preliminarily. The results are as follows. Mean sea level pressure and 2 m temperature have higher correlation coefficients than 2 m relative humidity and 10 m wind between ERA5 reanalysis and observation. Temperature and relative humidity have better evaluation applicability in the middle and lower level than the upper level troposphere, meanwhile geopotential height and wind agree well with the observed data in the middle and upper level of troposphere. The correlation of mean sea level pressure has the most significant seasonal variation, while 2 m temperature,2 m relative humidity and 10 m wind speed have more significant seasonal variation at partial stations. The correlation of 10 m wind direction has obvious regional differences. The evaluation applicability of upper level elements from ERA5 doesn't have significant seasonal variation and regional differences. ERA5 reanalysis has better evaluation applicability than ERA-Interim reanalysis based on comparisons, especially relative humidity and wind have more improvement in surface and low level of troposphere.