The biggest challenge of “one country，two systems” policy in the Hong Kong Special Administrative Region is that the return of the hearts of Hong Kong people is not well done.The reasons are very complex and the core reason is that the Hong Kong residents，as members of the state，have not fully established their approval on the nation's power system.In the future，we should build and improve the political and legal citizenship and its implementation mechanism of Hong Kong residents，and build a constitutional patriotism in Hong Kong so as to promote the real return of Hong Kong.