1. A recipe parameter management system for collecting, from a review system, data including recipe parameter setting values of recipe parameters when a defect review is conducted, and managing the data, comprising: a collecting unit for collecting from the review system, as recipe parameter setting history data, data including the recipe parameter setting values set to the review system when the defect review is conducted, numbers of trial reviews carried out until the recipe parameter setting values are set when the defect review is conducted, and defect images obtained when the defect review is conducted; a storage unit for storing therein the collected recipe parameter setting history data; a histogram generating unit for generating a histogram with respect to the recipe parameter setting values based on the recipe parameter setting values contained in the recipe parameter setting history data stored in the storage unit; and a display unit for displaying, for each recipe parameter, the histogram generated by the histogram generating unit and the numbers of trial reviews.