Since 1991, although the absolute scale of transaction cost has been increasing in China, but the proportion of the transaction cost in GDP remains comparatively steady. The cause is that the economic system transition counteracts the increase of transaction cost. Economizing transaction cost is the source of economic increase, and the aim of economic system transition is to economize the transaction cost. Thus, economizing transaction cost can be regarded as an important sign to evaluate the economic system transition performance. From this perspective, the performance of economic system transition is remarkable in our country in the last decades.