Cloud computing is one of the newest and most successful computing technologies in recent years. However, despite the increasing use of cloud computing, it is difficult to take full advantage of its unique potential, due to inherent problems such as quality challenges, lack of shared resources, performance interactions and efficiency. Today, the quality of service for cloud computing is a key factor in improving support for a large number of users. It should be noted that the satisfaction of users in the field of cloud computing and providing the desired level of quality in providing services, are the main factors for the success, progress and development of this paradigm. Therefore, cloud service providers, using different methods and techniques, try to provide the best quality services with different and varied prices to customers. Hence, adopting a proper quality management perspective will attract more customers and higher revenues for cloud providers. This paper focuses on examining quality-oriented cloud computing business models, quality challenges and strategies, as well as comparing the most important perspectives on improving service quality by highlighting the associated advantages and disadvantages. Finally, after describing quality challenges in environments cloud computing introduces suggestions for improving the service quality management in cloud services.