Internet and information and communication technologies (ICT) have effective rolling economic and financial Transactions in each country. ICT in multiple forms such as increasing economic growth and productivity of the economy, promoting trade of goods and services and reducing inflation and transaction costs, have been positive out comes in the economy. Present study aims to use the data of eighth banks, including Bank Melli, Mellat, Saderat, welfare, trade, industry and mining, Sepah and Eghtesad in the period 2000 to 2013, analyse impact of the Internet on the banking system productivity. For these two indices, the number of internet banking customers and online transactions number is used as an indicator of the presence of the Internet in the banking system. Also, the rate of return on assets (ROA) and return on equity (ROE) included as the dependent variable in model and after applying data stationary test and co-integration test between model variables via Pedroni co-integration test, using panel data method, four separate models estimated using panel data and the following results were obtained. The number of internet banking customers and online transactions has positive effect on the efficiency of the banking system in Iran. In the long run, all other factors being constant, if the number of Internet customers increased by 1, 000 units, there turn on assets and return on equity increase0. 18 and 0. 16 percent, respectively. Also, the increase in the number of Internet transactions by 1000 units, there turn on assets and return on equityincreases0. 17and 0. 13 percent, respectively.