While people believe there is a two-party system in Australia, others think it is a manorial government (Costar & Curtin 2004). This essay will examine the existence of other party systems from two aspects. The first concerns the formation of the government, focusing on the party structure of the Senate and the House of Representatives, it also analyzes the position of the Nationals. The second is the legislative process, studying a legislative case to indicate that two major parties did not have full control. First, the Senate is run by a multi-party system. Thanks to proportional voting, minor parties and independents find it easier to win a seat in the Senate and become influential (David 2016). Indeed, after every election an “independents' day” is claimed, because they refuse to cooperate with two major parties (Prosser & Warhurst 2014), and will continue to play a significant role in the Senate (Prosser 2012). it is a two and a half party system in the House of Representatives. Warhurst (2008) agrees with this statement because the Liberal is supported by the Nationals. Indeed, using the actual number (Taagepera 1999) to calculate the party system from 1946 to 2013 (Michael Gallagher 2015), most of the results were closed or even above 2.6, thus, a value of two and a half- The party system is proven. In fact, the Nationals should be treated individually as a “half” party. The first evidence is ideological differences, the national ideology is “Country-Mindedness” (Davey 2010) and focuses on regional development, while the liberal one is economic liberalism and emphasizes business growth. The second is the political position of the national teams. Alan Siaroff (2003) indicated that a “h...... middle of paper……rty” system is happening “naturally” as the electoral system has been used to eliminate other weak parties (Katz & Mair 2009).In conclusion, this essay proves the existence of a multi-party system in the Senate and a two-party system in the House of Representatives. Furthermore, this essay also indicates that the National should be treated as a “half” party. Furthermore, a multi-party system is recognized in the process of passing laws in both Houses. Indeed, some already believe that Australia is operating a multiparty system (Curtin & Miller 2011) or a full coalition government (Paun 2011). Furthermore, people currently tend to vote for option C: “none of the above” (SBS 2015), because they cannot identify the ideological and political differences between two main parties (Katya & Hilary 2008), hence, a multiparty system. the system will be modeled firmly.