Abstract: EPC mode is usually adopted in many major and complex projects. On-site working of design enterprises is conducive to keep relevant parties communicate and coordinate timely and to provide technical services. The enterprises carry out survey, design and services on site in form of consortium, which can give full play to the advantages of EPC, improve the project quality and speed up the construction schedule. However, multiple organizations and personnel with diversified professional background are involved in this pattern. It brings a huge challenge to design management. By analyzing the site office management of EPC consortium for Section 1 and Section 5 of the Myanmar-China Oil and Gas Pipeline (in China), merits and demerits of site office management and basic requirements and main contents thereof are collected. The study results can provide significant reference to the similar project management in the future.