Cloud services can be viewed as service solutions based on the cloud computing. The adoption of cloud services has become a topic of tremendous interest because organizations struggle to improve their Information technology performance. Utilizing cloud services may advance an organization's competitiveness. However, many organizations are worrying about issues of security and reliability. This leads to the result that a number of organizations intend to introduce the internal cloud solution. Here arises an imperative issue of how to identify significant factors affecting the adoption strategies of cloud services. Hence, this paper develops a research framework based on Technology Acceptance Model related theories with additional imperative constructs such as security and trust, together with employing rough set theory for data analysis. According to the findings of this study, management implications and conclusions are discussed.