Abstract: An apparatus and method for diagnosing developmental disorder using an artificial neural network are disclosed. An apparatus for diagnosing developmental disorders according to one exemplary embodiment includes a communication unit that performs communication with one or more user terminals and a control unit connected to the communication unit, in which the control unit receives at least one of image data and voice data for an analysis target from the user terminal and performs a first developmental disorder diagnosis through one or more artificial neural networks learned to perform a developmental disorder diagnosis, receives questionnaire response data from the user terminal and performs a second developmental disorder diagnosis according to predetermined standard, and generates developmental disorder diagnosis data for the analysis target based on the first developmental disorder diagnosis and the second developmental disorder diagnosis.