Education designed (provided) to meet the learning needs of children with special needs is called special education. The Salamanca Declaration adopted by the World Conference on Special Needs Education held by UNESCO in June 1994 said: "Every child has his own unique characteristics, interests, abilities and learning needs; The design of the education system and the implementation of the education plan should take into account the wide differences of these characteristics and needs. " The education of different kinds of special children can be divided into blind children's education, deaf children's education, mentally retarded children's education, extraordinary children's education, speech-impaired children's education, emotional and behavioral disorders' education, multiple disabled children's education and so on. The main spirit of special education is to consider the individual differences within each child and between individuals.