Smart Computing Artificial Intelligence(AI)technology is an emerging core in the field of information technology,upgrading computational efficiency and promoting the development of emerging technologies such as big data analysis,machine learning and artificial intelligence.This paper focuses on the security and privacy protection mechanism of Smart Computing AI in cloud computing environment,focusing on the initialization,subkey generation and encryption processing flow of Advanced Encryption Standard(AES)algorithm,and experimentally testing the effectiveness of the algorithm in defending against network intrusion attacks.The results show that the algorithm performs well in improving data security,with a view to providing practical methods for data security and privacy protection of Smart Computing AI in cloud computing environment.