In today's global digital wave,cloud computing technology is gradually integrating into various industries.However,as data migrates to the cloud,security and privacy issues are becoming increasingly prominent.This article deeply explores data security and privacy protection strategies in cloud computing environments,and systematically analyzes them from multiple dimensions such as technical protection,laws and regulations,user education,and multi-party cooperation.Research has shown that building a secure and trustworthy cloud ecosystem requires a multi-faceted approach,such as strengthening encryption and access control technologies,improving data protection regulations,enhancing user security awareness,and promoting information sharing within the industry.Only by working together can all parties enjoy the convenience of cloud computing while effectively safeguarding data security and user privacy,and promoting the integration and development of cloud computing technology with various fields.