Abstract: Taking Shen county national reference climatological station, Guan and Chiping county national ordinary meteorological stations as reference stations and using the methods like difference value comparison, linear trend, correlation coefficient and uniformity t test, the author analyzed the integrity, consistency and uniformity of observed data sequence from 1961 to 2013, including annual average temperature, precipitation, relative humidity and wind speed of Liaocheng national ordinary climatological station. The results indicated that: (1) the monthly and yearly miss rate was 0% in Liaocheng Station present site, and the integrity of observational data was well; (2) the consistency of regional temperature was good, and due to the limitation of regional precipitation, the regional consistency of precipitation was ordinary; affected by the sites and meteorological observation environment change, the regional consistency of wind velocity and relative humidity were poor in present site after 2003; (3) the annual average temperature was a continuous sequence, the continuity of average annual precipitation and relative humidity were fine, the continuity of average annual wind velocity was poor, the site change and growing trees around site location had impacts on the uniformity of station observations.