1 : An information management method in which a computer manages information, comprising: an information storage step in which the computer stores information which is to be managed and is inputted to the computer with the information associated with each of the plural nodes as a document file including plural node data associated with node identification information for identifying the nodes, an information display step in which the computer displays information about the document file stored in the information storage step, and an information evaluation step in which the computer executes a script included in the node data, wherein the node data includes parent node identification information for pinpointing a parent node of said node excluding a root node, the script includes a script for substitution for obtaining a value of self node variable data by performing computation using self node variable data which is variable data included in said node data and upper node variable data which is variable data included in node data of a lineal upper node of said node, the information display step includes: a tree structure display step of displaying a tree structure of the node using the parent node identification information; and a node data table display step of displaying the script, the upper node variable data and self node variable data of a node selected from among nodes of the displayed tree structure, and the information evaluation step includes a step of updating a value of self node variable data by execution of the script for substitution.