With a new perspective, this paper begins with the relationship of the Tsar, the Tsar\'s government and the State Duma to analysis the State Duma in the whole power system\'s status and role.

The administrative reform of Ivan IV of Russia mainly includes three measures: establishing coronation,setting up a "Senior Official Rada" system and the establishment of official departments among which the establishment of Tsarist system and official departments had a far-reaching impact on the Russian society.

However,due to Tsarist government adopted different policies towards Cossacks in different times,Cossacks were transformed from the organization of fugitive peasants to a military class of Russia,from a free and equal symbol to a tamed tool of Czarist government.