1.2. Problematic of research: From those reasons I mentioned above, I choose the research project: “Sureying the internal creadit audit in Petrolimex group commercial joint stock bank”. 1.3. Research objectives: Research objectives are to clarify the theory of internal audit work in enterprises in general, banks in particular and the actual situation of internal creadit audit works in Petrolimex group commercial joint stock bank. 1.4. The questions are posed in the study: What is the theory of internal audit work in enterprises in general and in banks in particular? Is internal creadit audit of Petrolimex group commercial joint stock bank reliable? Is internal audit process, regulations and administration in Petrolimex group commercial joint stock bank lose? Is organization of internal audit work in Petrolimex group commercial joint stock bank. In compliance with basic principles? What are shortcomings? Specifically as follows: How the internal creadit audit look like? Organizational structure of internal auditing like? The internal creadit audit process is closely organized? Organized testing, quality control, internal creadit audit? 1.5 Object of research: Petrolimex group commercial joint stock bank 1.6 Scope of research Although internal audit is an essential tool for all types of organizations, the topic only focuses on internal creadit audit work organization in Petrolimex group commercial joint stock bank. 1.7. Research methodology: 1.8. Contribution of research The topic helps clarify the perception of internal audit work in general and internal creadit audit work organization in Petrolimex group commercial joint stock bank.in particular. Assessment of the situation of internal creadit audit work in Petrolimex group commercial joint stock bank is to synthesis and makes some proposals for improvement of internal creadit audit work in Petrolimex group commercial joint stock bank. 1.9. Structure of thesis Besides thanks, contents, list of diagrams and references, structure of thesis include four chapters. Specifically: Chapter 1: Overview research on internal audit Chapter 2: Some basic theory on the organization of internal audit work Chapter 3: Research Methodology and organisation of internal creadit audit at Petrolimex group Commercial Joint Stock bank. Chapter 4: Conclusions, discussions and recommendations to improve the internal creadit audit system at Petrolimex group Commercial Joint Stock bank.