Aim: In today's business environment، there is an increasing attention on corporate governance principles، and strong governance systems are required to ensure that the organization achieves its objectives and meets the expectations of stakeholders; Therefore، the main purpose of the present study is to prepare and compile a written code for corporate governancein Hormozgan Gas Company. Methodology: The statistical population of the study consists of members of the board of directors، senior and middle level managers and financial experts of Hormozgan Gas Company. 35 questionnaires were distributed by non-random sampling among participants and 30 questionnaires were filled in and collected due to the restricted statistical population. The data obtained from the questionnaire were tested using Binomial test procedure. Results: Findings revealed that the preparation and development of corporate governance system in Hormozgan Gas Company is essential and the mechanisms selected from the corporate governance system enhance efficiency، effectiveness، transparency and accountability. Moreover، the results showed that in terms of the importance level of corporate governance principles، corporate governance principles are of the highest priority to improve efficiency. In the second priority، corporate governance principles improve effectiveness and enhance transparency and accountability in the third and fourth priority respectively.