The bureaucratic behavior research of public choice theory begins with Niskanen's "Bureaucracy and representative government". In the book, Niskanen regards many self-interest motivations of bureaucracy make they try to maximize budgets. In order to prove of false maximize-budget behavior, Scholars try to find cases to test.However, after surveyed relative research, we find not maximize-budget but administrative discretion, physical environment and public-service motivations, and stability etc are the basic motivations of bureaucracy. Finally, to avoid meaningless dispute, we choice Taipei city government's Governmental on-line applying service to test our hypothesis. By statistic analysis, this article concludes different motivation would product different affection.Keywords:public choice theory, bureaucratic behavior, hew public administration, budget maximizing