In the pro cedure of the surv ey-desig n of the bridg e a nd culv ert , there are sev era l interfaces produced f rom the connectio n of the informa tion t ransmission. The essentials and the methods for co ntrol ling these interfaces a re propo sed. Based on the interface cont rol, the quality of desig n may be rai sed, and the fai lure of desig n and eng ineering may be av oided.