I actually SaaS SaaS is not very understanding, but once heard when listening to a speech, probably referring to the software and services, with the development of Internet technology and applications mature software, began to rise in the 21st century, a completely innovative software application mode. SaaS is a software model provided by the Internet, unified application software vendors to deploy on their server, customers can choose according to their actual needs, purchase application software and services needed to vendors through the Internet, according to the order number and duration of service payments to vendors, and get manufacturers to services provided through the Internet. For many businesses, SaaS is the best way to use advanced technology, which eliminates the business to buy, build and maintain the infrastructure and applications needed for.