The actinometer of the new type DZZ5 automatic weather station at Nyingch of Tibet is equipped with the fullautomatic precise dualaxis tracker, which is of the function of automatic sunshine observation. By comparing the differences of the sunshine measurements from newtype instrument and the formerly used, the conversion factor is given, and the reasons and regularity of the difference formation are analyzed further, which provides basis and reference for scientific researches. According to the related requirements of radiation observation, some suggestions about the problems in the equipment configuration and application software of newtype DZZ5 automatic meteorological stations are put forward for improvement, so to facilitate automatic sunshine observation to replace artificial observation safely and reliably.