Abstarct: Hydrodynamic coefficients such as transmissivity and storage coefficients are crucial parameters in managing hydrogeological challenges such as budget and mathematic modeling. In this study, the hydrodynamic coefficients of Shirvan aquifer in north Khorasan province have been assessed baxsed on different methods. The transmissivity coefficient has been evaluated baxsed on pumping test, specific capacity and borehole logs. Exploration wells, pumping test and exploitation of Shirvan aquifer has been performed in years and 1378. The transmissivity value fluctuations in pumping tests conducted in 1378 vary between 40 to 400 m2/d which differs significantly from the available data from 1349. This significant difference can be justified by decrease of water level and reduction of saturation thickness in the aquifer. The transmissibility values calculated baxsed on specific capacity data ranges from a minimum of 11 m2/d to a maximum of 254 m2/d. baxsed on borehole log experiments, the transmissivity values ranged between 13 to 699 m2/d. In most areas, there is a good correlation among pumping test, specific capacity and borehole log results. In this study a combination of these methods has been used to evaluate the transmissivity of Shirvan aquifer and the transmissivity map has been sketched manually. Finally the transmissivity of shirvan aquifer has been estimated about 50 to 150 with an average of 100 m2/d. The specific yield of Shirvan aquifer was calculated baxsed on the data from pumping test, borehole log and ground water budget and the obtained values were 3%, 3% and 8% respectively. Therefore the mean specific yield of the aquifer is about 5%.