Abstract
Success of cloud computing service depends on an acceptable pricing model, especially in the PaaS. As a dynamic platform, PaaS layer depends on the infrastructure layer and extends to the application layer. How to find an optimal pricing policy is the problem for the cloud providers in face of stochastic and dynamic demand. In this paper, we present an approach of dynamic pricing model in order to get max profits. We analyze the model by a multi-condition hybrid system. But we also use a theory of revenue maximization and cost minimization. When at a current state, the system content cost minimization to build a hybrid system for revenue maximization, we will get the most profits.