Scottish Independence Referendum, as a specific case after cold war, is a hot topic in recent international relation studies, and these studies, to a certain extent, have being signified a drop from interaction among state actors to interaction among non-state actors. Introduction of the level of analysis from international political academic area in this study elaborates driving forces behind the desire for Scottish Independence, also, such an introduction attempts to structuring analysis paradigm for international political problems with level-dropped characteristic. This study starts with observation of Scottish Independence Referendum results, hence, pulls out the question of what driving forces facilitate the referendum. It further generalises three independence hypotheses, Boosting of National Sentiment, Discovery of Northern Scotland Oil and Defeat of Two Parties Campaign Strategies through the narrative history of Scottish independence, which points out particularities of combination of Scotland and England, effect of British Empire. It then indicates the inharmonious results by comparing the previous hypothesis and reality, and introduces the Level of Analysis due to analysis Scotland and England strength in system level, features of Scotland in actor level, consideration and preference of Prime Minister and First Minister of Scotland in decision maker level, sequentially, confirms that features of Scotland in actor level, together with consideration and preference of Prime Minister and First Minister of Scotland in decision maker level, are basis and direct driving force for Scottish Independence Referendum respectively.