The election system is as significant a matter as the political contribution when the political reform issue arises. The influence given by the change in the election system is enormous. There are a number of cases in which the political situation varies largely after the election system reform. Enough examination on how the reform affects the political scene is essential before the reform is actually conducted. Reference to the prior cases of reform conduced abroad is also necessary. To understand the political systems abroad and the influence of them on the politics in each country is quite useful in conducting political reform by ourselves. This thesis handles the Australian election system. Australia introduced, ahead of other countries, the basic election system such as the universal suffrage or the woman suffrage. Also Australia has introduced its unique systems such as"preferential voting"and"compulsory voting"which are novel and deserve to examine closely. Based on the recognition of the issues above, this thesis aims to reveal the contour of the Australian election system and examine how the system affects the Australian scene. Then I'd like to reveal the fact that the Australian election system is working against the ruling Australian Labor Party.