Trust is most challenging issue for the growth and adoption of cloud computing but the trust management systems are becoming apparent and promising technology to better the e-commerce providers and consumers relationship. Various trust models are proposed for managing trust feedbacks but reliability of trust feedback is generally ignored. It is very difficult to maintain trust feedback due to dynamic nature of cloud and unpredictable number of cloud users for service. Although it is very important to find the reliability of trust feedbacks because unreliable trust feedback can generate inaccurate trust results. This paper introduces the challenges and threats that can compromise the trust system. We proposed the trust management framework that can effectively filter out the unreliable feedback based on the behavior of cloud users, ageing factor, majority feedbacks and exogenous method and measure the trustworthiness of service provider. This proposed framework can produce accurate trust results and valuated and compared with existing system.