Abstract: The clarity of property rights is highly related with the rights, responsibilities and interests of the subject. Compared to single subject organizations, multiple subject organizations have more difficulties in clarifying property rights. Starting from the beginning of the 1990s, China’s reform of official car system has experienced three modes earlier or later across the country, i.e., from strengthening management, to marketization (or called half-monetized) reform, then to monetized reform; its essence is to improve continuously the consistent degree between the user of the official car and his rights, responsibilities and interests in using the car, namely, to clarify the property rights of the cars when being used. As the newest mode of the reform of official car system, the reason why the monetized reform mode has replaced the other two modes and become the mode widely adopted throughout the country at present is that it not only let the public officials who use the official cars bear the highest consistent degree of their rights, responsibilities and interests, but also through the independent choice of the users of the official cars it can improve the consumption efficiency, further reduce the operating costs of the official car system and improve the institutional efficiency in the premise of meeting the requirements for cars for official duties.

Key words: clarifying property rights; reform of official car system; monetization reform mode; consumption efficiency; institutional efficiency