The Special Administrative Region is an administration region operating a special social economic system in a special legal position that is established based on the Chinese Constitution and the Basic Law of mainland China. The fundamental characteristic of “one country, two systems” which is the theoretical base of the Special Administrative Region, is for one country to accommodate two systems and to develop socialism by maintaining capitalism in partial areas. The Hong Kong Special Administrative Region guarantees the “50 years of unchanging” current social economic system and lifestyle while having the capital lease along with administrative power, legislative power, independent power, and independent judicial power excluding diplomacy and national defence. Therefore, the Hong Kong Special Administrative Region, within a mono form of state, possesses systematic uniqueness through executing an altered form of government as opposed to the separated powers system of the western countries or the National People's Congress system of China. Based on The Basic Law of the Hong Kong Special Administrative Region of the People's Republic of China. Hong Kong enjoys high degree of autonomy. No mailer how highly, the high degree of autonomy of Hong Kong Special Administrative Region comes from centre. It is based on centre authorization and bounded by Basic Law. Basic Law rulers the scope of high degree of autonomy, but it is not so clear. Hong Kong Special Administrative Region may do something beyond authorization. On the one hand, we should deal with the action in excess of authority of Hong Kong according to different condition, On the other hand, we can not take baric the authority arbitrarily.