Recently, the significance of ship inspection is recognized more than before because of the strong paying attention to environmental and safety problems. However, current ship inspection relies on the experience of the worker. Therefore, it is difficult to grasp and to improve the state of ship inspection. In this paper, ship inspection is classified into three stages (Plan, Do and Check), and total supporting systems for ship inspection are discussed. Moreover, prototype system for inspection planning stage is developed. This system is called “Ship Inspection Simulator”, in which worker can execute virtual ship inspection, then, damage finding probability of each hull part and looking-off area in inspection are calculated automatically. In order to realize this, some new models and functions are introduced. These are “Inspection Position Model”, “Extract Function” and “Analysis Function”. “Inspection Position Model” expresses worker's view at each inspection position. “Extract Function” and “Analysis Function” are defined to calculate damage finding probability and looking-off area in each hull part by the use of product model and “Inspection Position Model”. Some examples are shown at the end of this paper.