The textbook "Audit from Theory to Practice" Part I, covers a wide range of audit problems: legal, organizational, scientific. Theoretical bases of audit, forms and methods of audit firms' activity, rules (standards) of audit, normative documents regulating audit in Kazakhstan, international normative documents are considered. Different aspects of modern audit organization are reflected in the manual. Basic notions, conclusions on the topic, collisions of audit, problem situations for knowledge control are included. The textbook will be useful for students and teachers of educational institutions of secondary vocational education of economic profile, as well as auditors, accountants, entrepreneurs, managers and analysts.