Development of industrial sector in any country is an important issue for development and welfare of the society. It is, in this regard important to look into the role played by exchange and trade policies on such development. In this paper, we have focused on impacts on development of industrial sector, in Iran, during the period 1963-1998. The key concepts applied in this paper, are as follows: export effective exchange rate (EERX), import effective exchange rate (EERM) and trade bias (BI= EERM/EERX). We have therefore concentrated, at first, on, computing these indexes, though detailed study of foreign trade policy of Iran. The second step, is to apply econometric tools and methods to the data produced in the context of the relationship between industrial value added and industrial export as dependent variables and EERM, EERX, as independent variables. Our estimation shows that as regards policy, while Iran has followed import substitution in the period 1963- 73, the country has moved into a period of export promotion, in the next period 1974-78. In the post revolution era, it seems again that we are confronted with different sub-periods, from this point of view: 1979-81, seems a period of import substitution, while the other years, up to 1998 must be considered as period of export promotion. Based on another result, an increase in EERM can lead to a reduction in industrial value added, in Iran. Our analysis shows that, this phenomenon is a structural element in Iranian industries and perhaps the country is in need of going about changing its industrial structure. Another result obtained from our studies is that an increase of about one percent in EERX, conteres paribus, will eventually cause an industrial export growth rate, 55 percent.