We estimate our lives in various values and then we behave in many different life-styles now. One's possession of things is under the influence of one's life-style. Then it is important that we get hold of the difference on possession of things than the standardizing those things. We have the view point of the development of a new system, catching one's own things in one's life-style. In this study we make a proposal new system on estimating the volume of storing space using the computer. And we present the soft ware of the system, the rules of possessing one's things and designing them, for programing of the computer. At first we construct the data-base covering the all things storing in a house and we put the informations of one's things in one's house and the life-style. And then we get the number and the volume of things in one's life in the near future. Next we estimate the volume of the furniture storing those things which are stored suitably, by "The Design-Information 1" and "The Family, Person-Information 3". On graphic display we can study and make sure of reasonable volume for one's possession of things in one's house. Finally we get the design of the suitable storing space for one's family, by putting "The Family, Person-Information 4" and "The Design-Information 2" in it. We mention the framework of this system and the quantifying of one's things in this study. We are going to explain on estimating the volume and the graphing in the part 2 and making the questionnaire on the data of working the system in the part 3.