<P>PROBLEM TO BE SOLVED: To provide an electronic brain, data structure thereof, and a knowledge processing method. <P>SOLUTION: In the electronic brain, the data structure to be used is a hierarchically-structured knowledge map, the knowledge map including many knowledge symbols, the knowledge symbol being a carrier symbol or a concept symbol, each knowledge symbol having a unique knowledge symbol address notation. A syntagmatic chain exists between the knowledge symbols of an upper layer and a lower layer, each knowledge symbol being provided with a knowledge attribute table to describe one or a plurality of attributes, and each attribute being provided with an attribute name and an attribute value. The electronic brain is provided with one or a plurality of knowledge interpreter to decode a knowledge command, the knowledge command being provided with a knowledge operator and one or a plurality of parameters. The electronic brain operates the attribute value under a language environment condition determined by the carrier symbol. <P>COPYRIGHT: (C)2005,JPO&NCIPI 
ELECTRONIC BRAIN, DATA STRUCTURE THEREOF, AND KNOWLEDGE PROCESSING METHOD