Since 1990s, the study of privatization has gone beyond using the rigid traditional “dichotomy” perspectives when taking approaching the issue, by thinking outside the box, government officials started to focus on how to use private sectors’ special characteristics wisely and return to the basic aim of privatization. government officials begin to think about how to make good use of the resources and vitalities of private sectors in order to deliver different functions within the public services provided by the government, and to improve the quality of public services and reduce the cost that have been bearing on the shoulder of the people at the same time, thus, forming a lively, flexible and versatile way of delivering public services, which is called “the second wave of privatization”. In this paper, the author uses Private Finance Initiative and Japanese-Type of the Third Sector as examples of New Public Service models, and introduces their concepts, features, types, outcomes and limitations. This study shows that although the original goal of the two models previously mentioned are to attract more private sectors’ funds, professionals, and skills, in hopes of guaranteeing the deliverance of public services. However, after implementing the models, the author discovers that because organization designing differentiated between public and private sectors; the former is committed to protect “publicness”, while the latter is after interests and efficiencies. When trying to put public and private sector within the same organization system, the contradiction of their organization characteristics makes it unlikely for the two models to help improve the efficiency under the public organization culture.