Information in contemporary living and working conditions represent basis for survival. Research that follows the development of accounting system as a part of a business information system point to its ever growing significance. In connection to this, establishing such a system in a country's administration requires resources which would be, in contemporary economic development conditions, implemented in a certain know-how way. The defence system as a part of the budget system has a necessity for knowledge obrained by the information system in accounting and finance domain. Despite the fact that public debt and fiscal deficit are growing, allocation for such a system represent an investment which would contribute to racionalization of resource use and shorten the required time in the decision making process.