This paper develops a fishing lamp mounting system which opens or closes a mounting rack according to a fishing situation. A developing fishing lamp mounting system is designed using CAD software. Members composing the fishing lamp mounting system are modeled with finite elements based on 3D CAD model. In addition, the fishing lamp mounting system is modeled with rigid bodies. A rigid body model of the fishing lamp mounting system is interfaced with finite element component models to develop a computational model of the fishing lamp mounting system for dynamic stress analysis. This paper performs a simulation with bouncing, rolling and pitching motion which describe a very rough sea condition. This paper manufactures a fishing lamp mounting system which is designed with CAD software and analyzed dynamic stress with CAE technique.