1. An inspection standard setting device to set inspection standards to be used at a process inspection which executes the process inspection determining pass or fail of an intermediate product by comparing a feature extracted from the intermediate product with a predetermined inspection standard, and a final inspection determining pass or fail of a completed product at a final process, comprising: a memory device for storing an extracted feature of each of a plurality of inspection items of the process inspection of the intermediate product and a determination result at the final inspection; a separation degree calculation unit for calculating a separation degree showing how much the product determined to be good and the product determined to be defective at the final inspection are separated in a distribution of the extracted feature for every inspection item or every combination of the inspection items of the process inspection based on data of a plurality of products stored in the memory device; a target item selection unit for selecting an inspection item whose inspection standard is to be reset from the inspection items or the combinations of the inspection items based on a value of the separation degree; an inspection standard setting unit for setting a new inspection standard for the selected inspection item, wherein the inspection standard setting unit is configured to receive a user input indicating the new inspection standard and further configured to calculate and present variations of the determination results at the process inspection and the final inspection based on the new inspection standard; and an interface configured to allow the user to change one or more of the plurality of inspection items and to simulate and present the resulting variation in determination result as a function of inspection standard value, wherein the interface is configured to allow the user to find an optimal value of the inspection standard based on the simulated variation in determination result.