Abstract: Due to the differences of the characteristics and environment of tasks,the indeterminacy levels of transaction,the number of potential counterparties,the levels of asset specificity and the trading frequency of different kinds of the cars for public affairs are different.Based on these transaction factors of the cars for public affairs,management of the cars for public affairs should synthetically follow the principles of bureaucratic organization,network organization and market organization.Based on the different relationships among the investors,the managers and the users of the cars for public affairs,the management of investment for the cars for public affairs can adopt administrative pattern,social pattern and market pattern.The different combination of the three types of organization and the three patterns of investment management are the fundamental direction for reformation of the classification of management of the cars for public affairs.

Key words: cars for public affairs, types of organization, investment management patterns, administrative mechanism