With the starting of the key hydraulic engineering projects, such as south-to-north water transferring project, water supply from Jiaodong area and project of diverting water from east to south of Shandong province, the service work of design representatives is a hard work. How to ensure the quality of service and to ensure that the construction works are carried out smoothly？ The work experience of design representative＇ s service for Liujiadaokou can be lessons and referring value.