Undergraduate colleges offer specialized courses to meet the educational needs of students with different levels and needs. College education emphasizes the cultivation of vocational skills and practical ability, and usually recruits high school graduates for three years. After graduation, you can get employment directly or go to undergraduate course for further study.

Here are some specific reasons:

1. Meet the social demand for vocational skills talents: University education emphasizes the cultivation of vocational skills and practical ability, which can cultivate more technical and practical talents for the society and meet the social demand for vocational skills talents.

2. Improve the level and quality of education: Specialized education can improve students' professional quality and practical experience, thus promoting the development and progress of the whole society.

3. Broaden the channels for students' further study: Specialized education can provide students with different channels for further study, such as employment or promotion to undergraduate courses for further study.

4. Improve the educational structure: Specialized education can improve the educational structure and improve the integrity and coherence of the whole educational system.

In a word, the purpose of offering specialized courses in undergraduate colleges is to meet the educational needs of students with different levels and needs, improve their professional quality and practical ability, promote social development and progress, improve the educational structure and improve the integrity of the whole education system.