From the review of integrated research on the topic of freedom of the Auditor (Auditor Independence) is a research study of the relevant historical research for a period of 10 years since 2005-2015, the online database of mahasarakham University contains Science Direct database, Complete, Business Source Complete ABI Inform by searching with the term "Auditor Independence" trace results found for research that involves a number of selection, so 5280 article number of 66 articles to in-depth studies.