Investigation on seismic parameters of an area can provide valuable information on the distribution of stress and the location of future earthquakes on that area. In this study, using earthquakes catalogue of Kopet-Dagh as a seismotectonic province in north-east of Iran for the period of Jan. 2006 to Jun. 2017, we estimated the parameters related to seismicity of the area along with the recurrence time of earthquakes with magnitude 5.5 and 6, applying Gothenburg-Richter equation. Although the maps of recurrence time TL(M) for the desire magnitudes show the non-capability of study area for occurring an earthquake with magnitude 6 up to 70 years later, but they revealed capability of occurring an earthquake with magnitude 5.5 in the vicinity of West and North-west of area by 15 years later.