Abstarct: Existence of abundant evidences of quaternary faults activity and background seismicity such as September 16, 1978 earthquake (Ms=7.4) have explicitly demonstrated that Tabas city is located in a seismic zone with high seismicity potential. This city is situated on the quaternary alluvium sediments that capable to amplify the ground motion. Recent major earthquakes have clearly demonstrated that near-surface local site conditions that can generate significant amplifications and play a major role in the level of ground shaking. It is therefore highly desirable to develop methods to identify and characterize regions that are prone to this type of site amplification. To determine the subsurface sediment characteristics over the studied area, measurement and analyses of microtremor have been employed at about 80 sites and the spectral ratio between the horizontal and vertical components (H/V) of the microtremor measurements at the ground surface has been used to estimate the fundamental periods and amplification factors of the site. Old microtremor measurements related to “geotechnical earthquake microzonation of Tabas” project (2009) that had been employed in about 52 sites, in order to make reliable final result, were analyzed. To assessing the efficiency of microtremor waves for determination of site characteristics, the H/V spectrum ratio shape from microtremor waves with spectrum ratio of Tabas governor accelerometer station records, related to 1978 Tabas earthquake (Ms=7.4) and its next years were compared and predominant frequency and amplification factor value were obtained. The results showed significant similarity in spectrum ratio shape and site characteristics values in both microtremor and ground motion specrum. Soil texture map which shows the soil distribution in the different parts of this area was extracted using the aerial photos. This map was compared with iso-period map in order to correlating the soil texture and predominant period distribution. Despite the matching in most cases, This study showed that there is not a complete correlation between these parameters. This study also showed that about 60% of this area are long period )>1) regions. There is possibility of long period ground vibrations in Tabas area due to long distant earthquakes, which might have severe effects on the structures especially those with long natural period like high-rise buildings. Finally, baxsed on the results, safest direct for future developement of city were recommended and also results demonstrated the role and the importance of site effect study in urban planning and development.