Traditional business processes are usually designed with process elements-activities and transitions. However, when the process is becoming complicated, such as dozens of activities which could jump to each other in one complex workflow, the process modeling is becoming harder, and the system will probably turn to poor performance. In order to solve this problem, this paper presents a system of workflow state machine cloud based on cloud computing and the mechanism of finite state machine, which can simplify the activities and transitions by coding the flow process to achieve high performance, and elaborates the mechanism of the state machine framework in cloud. Finally, the developing method of business application based on the workflow state machine cloud is introduced, and the performance results tested in container are given:the time consuming of one-step flow between activities running in two containers is very short. That means the design based on Docker can achieve high performance as well as maintaining scalability.