The formation of Islamic economics is one of the serious challenges of Islamic economy. Martyr Sadr thinks that there are two ways for settling this problem. 1- If the fundamental principles of Islamic economy school have achieved , changes will take place in the field of economy. 2- When Islamic economy school begins its activity in establishing the economic relations of society , objective economic events will happen. When economists analyze these events , economics will take from. Martyr Sadr selects another way to achieve this goal. The present article seeks to show that martyr sadr`s preference of another way is influerced by his view of the function and aim on economics. The article sheds light of this view and offers another way of giving form to Islamic economics.