Abstract: The observational data of July. 1987 in the suburbs of Tianjin is used to compute the spectra of velocity, the spectra of temperature, the cospectra of velocity and temperature. The results show that the characteristics of the atmospheric turbulence spectra over the sub- urbs is basically in accordance with some typical results over the smooth terrain. But the scale, in which turbulence can obey the isotropic condition, over the suburbs is larger than over the smooth terrain. The spectrum peak frequency area is a bit narrow. The feature of the spectrum area in low frequency is out of accordance with that of the smqoth terrain either.