In order to determine a reasonable price of software as a service (SaaS) in cloud computing and make the companies be able to quickly dominate the cloud computing market and gain the huge profits in a sustainable development manner,the sales data from cloud computing companies were analyzed by integrating the static pricing and dynamic pricing and by using the breakeven point analysis,two-factor test,regression equation and some other mathematical models.On this basis,a reasonable pricing strategies was proposed for providing reference to policy-makers.Some code was written to achieve the automation of the data analysis.The development prospect of SaaS with reasonable pricing was looked far ahead.