Numerous challenges faced by Islamic banks, in their institutional or operational reality despite their widespread existence internationally. Many of these challenges have been studied. However, there are new challenges of criticism and evaluation, which seem to have been entertained poorly within the general context of evaluating of Shari'ah boards, or in the financial product innovation. The global financial crisis allows the Islamic banks to market their products in the global competitive environment, and found common acceptance with appreciation by optimistic future success. Amid this optimism contrary opinion that Islamic banks had deviated from their approaches and they become a typical to a traditional bank under a new name, and thus, it is impossible to be an Islamic bank without interest. An attempt is made in this research to analyze the modeling criticism of Islamic banks thus, the research divides the critics into three categories namely; appreciating the experiment while discovering the shortcomings with possible remedies. Secondly, to investigate why it is impossible to establish Islamic Banks without interest as proclaimed by the west? Lastly, it believes that, there is a paradox between the theory and practicality in Islamic bank, which may be resolved by reconsidering the experiment and return to the application of the theoretical model developed by the pioneers. It has also been a criticism of positions, which is divided into three categories namely; criticism over the intellectual foundation of the Islamic banks, their products and the wave of the oversight Shari'ah boards. The research also aims at modeling the writings of critics on different attitudes. Some supporters of the experience with emphasis on the reform of the defect, including naysayers while some of suggest that, to return to the theoretical model developed by the pioneers. Further criticism of founders. The research seems to have reinforced these criticisms, on the origins of these banks, and on the concept of Islamic economics in terms of: definition, the theory and methodology, along with the different laws and regulations in the countries hosting these banks. In conclusion, the study suggests a number of proposals, which may contribute to solve this dilemma, like standardization of contracts, corporate governance and governance of Shari'ah boards. 

Key words: Islamic banks. Classification modeling, Criticism, evaluation Shari'ah boards.