A hackneyed analogy between a living thing and a narrative provided us with authentically scientific approach by Propp in the field of narratology. The aim of this article is to make a rough sketch of the present and future situation of numerical analysis in folktale studies which we have started from the medieval French fabliau . By using Tesnière's structural syntax model, we can describe a motif, the minimal unit for the analysis, as a tree diagram that represents the dependency relations between a predicate and the other terms. We decompose further this tree diagram into terms and sub-decompose the latter into semes in order to obtain data that represents simultaneously the syntagmatic and paradigmatic structure of a narrative at a deep semantic level. This data can be handled by various computational tools based on a few models of genome informatics. Methodologically speaking, post -genome informatics which is now trying, from the end of reduction to the constituents, a synthesis of them to elucidate the vital phenomena as a complex system will be the fundamental model for the study of narratology also including the automatic narrative generation system.