A simulator system for determining optimum positions of navigation aids for ships, allowing a navigation aid to be freely disposed in advance in a virtual space reproduced in the same condition as a real sea area, before installing the navigation aid in the real sea area, by utilizing a simulation technology, the simulator system comprising: a simulation control module configured to execute general management over preparation, beginning, regulation and termination for the simulation; a ship/sea reproduction module configured to calculate the next state values from current state values, which include information about ship locations and wave heights, provided from the simulation control module and return a result of the calculation to the simulation control module; a database module configured to store information about ships and sea areas, navigation aid shapes and characteristics, and simulation executions; a virtual three-dimensional reproduction module configured to show information about ships, environments, weather conditions, and time which are provided from the simulation control module; a bridge reproduction module configured to reproduce steerage, engine telegraph, radar, and shipping characteristics; a sound reproduction module configured to reproduce sound from information about the sound effect reproduction which is provided from the simulation control module; a navigation aid management module configured to add, edit, delete, and dispose a navigation aid in the simulation; and a navigation aid analysis module configured to quantify navigation aid disposition results by locations, as a function of analyzing positional disposition results, or by courses, as a function of analyzing coursed disposition results, wherein the navigation aid analysis module is configured to quantify optimized disposition points for navigation aids at current ship locations during a virtual shipping operation in analyzing the positional disposition results, and/or wherein the navigation aid analysis module is configured to quantify optimized disposition points by navigation aids for correspondent virtual shipping courses, after a virtual shipping operation, in analyzing the coursed disposition results, and wherein the navigation aid analysis module is configured to transfer the optimized disposition points by navigation aids, which is quantified, to the navigation aid management module, allowing the navigation aid management module to use the optimized disposition points in determining an optimum position for a navigation aid. a simulation control module configured to execute general management over preparation, beginning, regulation and termination for the simulation; a ship/sea reproduction module configured to calculate the next state values from current state values, which include information about ship locations and wave heights, provided from the simulation control module and return a result of the calculation to the simulation control module; a database module configured to store information about ships and sea areas, navigation aid shapes and characteristics, and simulation executions; a virtual three-dimensional reproduction module configured to show information about ships, environments, weather conditions, and time which are provided from the simulation control module; a bridge reproduction module configured to reproduce steerage, engine telegraph, radar, and shipping characteristics; a sound reproduction module configured to reproduce sound from information about the sound effect reproduction which is provided from the simulation control module; a navigation aid management module configured to add, edit, delete, and dispose a navigation aid in the simulation; and a navigation aid analysis module configured to quantify navigation aid disposition results by locations, as a function of analyzing positional disposition results, or by courses, as a function of analyzing coursed disposition results, wherein the navigation aid analysis module is configured to quantify optimized disposition points for navigation aids at current ship locations during a virtual shipping operation in analyzing the positional disposition results, and/or wherein the navigation aid analysis module is configured to quantify optimized disposition points by navigation aids for correspondent virtual shipping courses, after a virtual shipping operation, in analyzing the coursed disposition results, and wherein the navigation aid analysis module is configured to transfer the optimized disposition points by navigation aids, which is quantified, to the navigation aid management module, allowing the navigation aid management module to use the optimized disposition points in determining an optimum position for a navigation aid.