The invention provides an integration method for estimating an atmosphere weighted average temperature and a troposphere delay. In estimating the atmosphere weighted average temperature, change amounts of an atmosphere steam pressure and an atmosphere temperature in adjacent height layers are considered, and the change amounts are used as an index form change and a linear form change. In estimating a zenith troposphere static water delay and zenith troposphere humidity delay, pre-estimation of a static water refraction index and a humidity refraction index is not required; furthermore the change amounts of the atmosphere pressure, the atmosphere steam pressure and the atmosphere temperature in adjacent height layers are considered; the atmosphere pressure and the steam pressure are used as the index form changes; and the atmosphere temperature is used as the linear form change. In a spatial vertical direction, on the condition that a steam pressure reverse-adding layer phenomenon and an atmosphere temperature inversion phenomenon exist, the new integration method can improve precision in estimating the atmosphere weighted temperature, the zenith troposphere static water relay and the zenith troposphere humidity delay.