Migration of information services to the cloud environment is becoming a crucial step in business modernization. This paper analyzes the advantages and challenges of migrating information systems to the cloud, with a particular focus on the three basic cloud service models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). It also considers four main cloud deployment models – public, private, community, and hybrid clouds. Cloud migration offers numerous benefits, including cost reduction, flexibility, scalability, and the ability to automatically upgrade systems. These characteristics enable increased productivity, better mobility, and greater sustainability, while reducing the negative impact on the environment. The paper also explores the key challenges organizations face during migration, including data security and privacy concerns, as well as the complexity of transferring existing systems to the cloud environment. Despite these challenges, proper planning and management can significantly mitigate risks and enable the successful implementation of cloud solutions. In conclusion, the paper demonstrates that choosing and combining different cloud service models and cloud environments is key to successful migration, allowing users to optimize their business processes while minimizing potential risks.