This study is directed for the development of a computer aided safety assessment system for agricultural irrigation structures. The developed system is composed of four subsystems that incorporate database, structural analysis, safety assessment, and postprocess, which are made to be interfaced systematically. It is developed in the user-friendly menu driving form with pull-down type interaction on a personal computer. The main algorithm for safety assessment of deteriorated structures utilizes a rational rating system based on the reliability method. From this study, it may be stated that the proposed rating and safety assessment system provide an effective tool and thus it can be widely used in practice for the assessment of safety and load carrying capacity of existing deteriorated or damaged agricultural irrigation structures.