The Workshop on Principles, Concepts and Application of Input-Output Tables was held in the Statistical Research and Training Centreby Mr. Farshad Rushan, Experts in IO Tables, Ms. Mahnaz Kazemi, Expert in Manufacturing and Mining Accounts, Dr. Behnushalsadat Aghayan, Expert in National and Institutional Production Accounts Group and Dr. Morashin Javan, Expert in Income Accounts of the Statistical Centre of Iran from 14-16 October2018 for 12 hours. In this Workshop, the participants were provided with generalities of national accounts, methods of constructing and compiling IO Tables and their applications as well as how the IO Tables for the year 1390 was constructed in the Statistical Centre of Iran.