現代政府分工細密，專業機關依賴資訊制定推行決策之法令，作成具體決定，並確保政策被確實遵行。隨著網路科技的發達，資訊流通更為迅速，資訊載體樣態複雜，速度、效率、自由、開放的新價值觀，在在衝擊傳統調查方法與法律制度之內容。 本論文旨在建構既符合法治原理與人權保障要求，又能契合時代脈動具前瞻性之行政調查制度，故從行政調查之概念界定，繼而探討其傳統面貌以鑑往知來，再進行比較法制之觀察作為借鏡，進而探討未來行政調查制度內容之各種問題，分別從調查權之法源依據、調查主體與被調查者之關係、各種調查手段應遵行之正當程序、對調查瑕疵之各種救濟可能等層面逐一討論之。 第一章 緒論 第二章 行政調查概念之形成與界定 第三章 各國行政調查制度之比較觀察 第四章 行政調查之法源依據 第五章 行政調查主體與客體之關係 第六章 行政調查方法與正當程序 第七章 行政調查之監督與救濟 第八章 結論 / Modern governments rely on the expertise of agencies. Those agencies need to collect and use information. They need information to make the rules necessary to implement and assess the execution of the policy and ensure compliance with the policy. With the advancement of information technical, the rapidity of network communication, complexity of information loader, the speedy, efficient, free and open values do have great impacts on the traditional investigative methods and legal system. This paper aims at constituting the legal system on collecting information, which conforms to the principle of the rule of law and protection individual rights. There are several focal issues in this paper, such as the legal basis of investigative power, the relationship between agency and individual, the due process of various collecting methods, the remedies and compensation of wrongdoings etc.

我國所得稅係採年度申報自繳制度，具有大量、反覆之特性，因此稅捐稽徵機關在所得稅申報期間之前，即已進行各種課稅資訊之蒐集活動，除藉此定出各類所得、費用標準，以作為核課依據外，嗣人民申報其年度所得稅後，即將蒐集之課稅資料與申報資料互相勾稽，作為選定事後審查對象及釐正申報資料與核定所得額之依據；當年度之所得稅申報資料及核定情形復又成為次一年度之課稅基本資料來源及比較對象，二者環環相扣，互為因果關係，形成一個獨立體系，而得以單獨作為研究之對象。次為掌握稅務調查制度之全貌，必須對其作全面性之審視及檢討，故本文採用源自日本之行政法學研究方法「行政過程論」從實現稅務行政目的之過程，歸納、整理所得稅事前課稅資訊蒐集活動及事後審查階段之調查手段、程序、屬性、相關人之法律關係、調查效果及其救濟途徑，以宏觀角度檢視現行法制下之稅務調查制度，藉以發現問題並試圖提出解決方法或修法建議。 / Taiwan adopts an annual self-reporting system for income tax return. Such reporting system involves massive and recurrent information. Hence tax authorities would collect all kinds of tax information before the annual income tax reporting period and use such information to set out the norms for different types of income and expenses as basis for taxation. Upon receiving the annual income tax returns filed by taxpayers, tax officers would check the filed data against the collected tax information, and based on the results, determine the taxpayers to be audited and the assessed income tax. The information contained in an annual income tax return and the results of assessment become the source of basic tax information and comparison for following year’s return. Hence income tax returns of two successive years are interrelated and can form discrete units for research purpose. In order to grasp the full view of the tax investigation system, comprehensive examination of the system is necessary. Thus this study employs the methodology of the “theory of administrative process” originated in Japan to examine the tax investigation system under the prevailing law in a macroscopic manner, from the process of tax administration, pre-filing tax information collection, the means, procedure and attributes of post-filing investigation, legal relationship of the parties concerned, to the effect of investigation and remedies available. This study attempts to discover problems, and based on which, propose solutions or suggestions for regulatory amendment.