The Workshop on Principles, Concepts and Application of Input-output Tables was held in the Statistical Research and Training Centre by Mr. Farshad Rushansangachin, Experts in IO Tables, Ms. Mahnaz Kazemi, Expert in Manufacturing and Mining Accounts, Dr. Morashin Javan, Expert in Income Accounts, and Behnushalsadat Aghayan, Expert in National and Institutional Production Accounts Group of the Statistical Centre of Iran from 15-17July 2018 for 12 hours. In this Workshop, the participants were provided with generalities of national accounts, methods of constructing IO Tables and their applications as well as how the IO tables for the year 1390 was constructed.