Revision comes from the Latin word „revidere“ which means watching again or sighting again. This also can be described as complex activity that is the examination procedure and evaluation of the financial statements, also the data and methods that are applied at the assembling of financial statements. The basic goal of the performance revision is to protect interests of the of the capital owner, creditor, potential investors, employee, suppliers, customers and others. Revision can be divided on: internal and external revision, business revision, revision of financial statements, commercial and revision of the state. When carrying out revision, it is essential to take account of the fundamental principles of revision. Based on several principles, generally accepted revision standards have been developed, there are ten of them and they are divided in three groups. Revision methods can be divided into three groups, and those groups are : general methods, special methods and analytical procedures in revision. We can observe revision profession through two positions, trough position of internal and external auditors. It is important to respect internal revision standards and to work accordingly. Internal auditors are going through a high level of professional training and education. They are going through two parts, general and special. The role of revision in company is to establish reliability, reality, integrity of financial and operational information based on which appropriate business decisions are made. Assessment of work quality of internal revision is done internally and externally, which can enable management to better understand the process of internal revision and her reliability in work. For an effective and successfully business management it is necessary that whole business process and his phases are planned in detail.