In this paper, the current situation of the management of urban infrastructure construction projects invested by government and the weakness of its managerial mode are briefly analyzed. The authors point out that it is a practical choice to improve the management by innovating in the managerial mode and establishing specialized organizations. Employing basic methods of science of organization and management, referring to the experience of developed countries, a new mode named "Works Bureau" is suggested. Two operational models based on financial and non-financial requirement of government projects are demonstrated in detail.