PROBLEM TO BE SOLVED : To provide a method for designing insurance for simplifying necessary and sufficient useful insurance design and reducing insurance costs in quick response to the individual cases of persons to be insured.SOLUTION : A policyholder is allowed to select and input the regional data of real estate to be purchased or rented, the structural data of the real estate, data related with the policyholder, and data related with the other real estate or policyholders on a site screen. Then, a selecting means connected to a storage means is able to select a necessary household goods item 2 based on the input contents of the selected term, and a calculating means connected to the storage means is able to calculate the insurance sum of the necessary household goods item based on the input contents of the selected term, and set the household goods insurance fee by totaling the insurance sum, and a display means is able to display the household goods insurance fee and/or the selected household goods item on the site screen.