1, the future maintenance needs: self-developed system because of experience and the user developer temporary requirements and other limitations, let the site will need to add or change in operation after a period of time, because of the background system adopted by each site is different, so developers want to unify the update operation is not realistic according to the requirements of users, so the only or the problem has been the emergence of a web site to repair and add functionality, such operations are time-consuming and not easy to manage, while ESPCMS has a clear advantage in the future maintenance and upgrades, because each website backstage, upgrade and repair of BUG is very convenient.