The adoption of International Financial Reporting Standards (IFRSs) in different countries of the world have become a contemporary issue particularly with regard to the reliability of financial reports. The conceptual and empirical examination of the IFRS adoption and financial reporting quality across different sectors and countries. The study established that some studies used positive approach and some used positive paradigm. Studies used either of primary or secondary source of data, while some used mixed approach. The study found that IFRS adoption are determined by comparing the parameters concerned between pre and post IFRS regimes in given jurisdictions. The review concept and empirical evidences of IFRS adoption and financial reporting quality from many countries reveals that economic consequences of IFRS adoption significantly differ across jurisdictions though its impact has been reported to be positive in majority of studies. Also, few studies report indifferent and negative effects of IFRS adoption on financial reporting quality. The study found that it is argued that IFRS is more financial position focused. It is also observed that the impact of mandatory adoption of IFRS tends to be greater disputed than that caused by voluntary IFRS adoption. In addition, IFRS adoption are found to supersede many other domestic financial reporting standards such as Statement of Accounting Standard (SAS) in Nigeria.