Clinical autism can be diagnosed by early screening, in addition to diagnostic assessment methods, as follows: 1. Early screening is mainly based on the child’s clinical presentation to determine several clinical manifestations typical of children, referred to as the five-step behavioral observation method: not looking at people, not responding, not speaking, inappropriate behavior and sensory abnormalities; 2. If a child is highly suspected of having autism, a diagnostic assessment is required, and the CARS scale is commonly used clinically to diagnose The CARS scale is commonly used to assess whether a child is autistic. In addition to the core symptoms of not interacting with others, patients also have other symptoms, such as mental retardation, etc. Currently, the Bayley Assessment and Griffith Assessment are more commonly used. The Children’s Adaptive Behavior Scale (CARS) is also used to observe the child’s social and human interactions and the consistency with autism symptoms.