Provided are an Asperger's diagnosis assistance method and system, and an Asperger's diagnosis assistance device, with which, employing a conventionally proposed sight line detection technology, it is possible to assist with early identification and early reliable diagnosis, particularly of infant Asperger's, on the basis of objective evaluations. An assistance method for diagnosing Asperger's of a subject, etc., employing a sight line detection unit (A) comprising at least either a camera part which image captures an eyeball of a subject or an electrode part which is mounted on the subject's head part and detects a movement of an eyeball, and a display part which is installed in the subject's sight line, displays on a screen of the display part a composite image in which two or more images formed from a specific person image (I) and a specific non-person image (II) are displayed contiguously, and after detecting, employing the sight line detection unit, sight line location information of the subject who views the composite image, inputs the sight line location information of the subject into a sight line location information storage unit, and evaluates the sight line location of the subject with a sight line location evaluation algorithm which compares the stored sight line location information of the subject with sight line location information of an Asperger's patient and/or a person showing normal development.L'invention concerne un procédé et un système d'assistance au diagnostic du syndrome d'Asperger, et un dispositif d'assistance au diagnostic du syndrome d'Asperger avec lequel, à l'aide d'une technologie de détection de ligne de vue proposée classiquement, il est possible d'assister à une identification précoce et un diagnostic fiable précoce, en particulier du syndrome d'Asperger chez un nourisson, sur la base d'évaluations objectives. L'invention concerne un procédé d'assistance pour le diagnostic du syndrome d'Asperger d'un sujet, etc. à l'aide d'une uni
