Software as a service. Saas sales model is an Internet-based "on-demand" software delivery model, which is different from the traditional software purchase and installation, and is also a cloud service model for software applications. SaaS is the abbreviation of software as a service, which is translated as "software as a service" in Chinese. SaaS is a ToB model, which transforms traditional sales software into sales service. Under the latest SaaS model, software development companies will first deploy standardized products to public (usually public) cloud servers and then sell them to enterprises. Enterprises only need to "register->; Payment-> After the software is configured, it can be used, which not only saves the trouble of deploying, upgrading and maintaining the software, but also greatly reduces the waiting time.