Abstract: Using t test to seven haixi prefecture, qinghai province belong to stand the temperature, pressure, average wind speed, relative humidity, 0-320 cm geothermal years average significance test sequence; Difference in manual and automatic observation data contrast analysis, on the basis of establishing regression equation between the manual and automatic observation elements, elements of significant difference in sequence regression correction and effect analysis.Resultsshow that the automatic replacement of artificial observation of hercynian 7 stand various meteorological elements annual average series uniformity had different degrees of influence, discontinuous multiple station elements; Statistical manual and automatic observation data elements month average contrast difference value, correction using monadic linear regression method, after reduction of the sequence of basic eliminates automatically replace artificial observations, and the difference of observation data uniformity and continuity is realized.