Abstract: Based on the statistical energy analysis (SEA), we quantitatively study the noise level in living quarter on offshore platform influenced by closure or open of main engine room doors, and provide the detailed noise level arrangement under different cases. Furthermore, we also optimize the door arrangement and give the right usage philosophy. According to the calculation results, it is found that front door has more influence than side door. To provide a better working environment, the doors at main engine room should be arranged at the side away from the living quarter.