Diagnosis includes assessment and observation, professional assessment tools and family and social environment assessment.

1. evaluation and observation: the diagnostic process of educational rehabilitation begins with the evaluation and observation of individuals.

2. Professional assessment tools: Some professional assessment tools will be used in education rehabilitation diagnosis, such as intelligence test, language assessment and behavior assessment.

3. Assessment of family and social environment: The diagnosis of educational rehabilitation also needs to consider the influence of individual's family and social environment on their rehabilitation.