Now days, the use of information systems is a necessity in organizations. Enterprise resource planning system (ERP) is one of the important applications of information technology, especially in the banking industry in our country. There are a lot of providers of ERP software package inside and out. Therefore, it is so important to select suitable ones which cover all needs and aspects of our organization. To solve this problem, we need to build a complete network of all factors involved in the decision and we also need right tools to identify factors into the network.  We have used Analytic Network Process (ANP) to make decision making network based on the research findings and innovations and we also have used Balanced Score card to identify effective factors .we have connected the two method together by using questionnaires to the 45experts and professionals in banking system  and  the 25implementing experts of  this software package in Iranian companies. We have applied SPSS and Super Decision software’s to solve proposed model and make valid research results. As a result, an ERP software package of SAP Company is proposed with 0.375 score as the most appropriate one rather than Mysis and Douran for Bank.