A method for sending a Network Configuration Protocol (NETCONF)-based notification is disclosed. The method includes the following steps: a NETCONF server accepts a notification subscription of a NETCONF client; the NETCONF server generates a notification when an event occurs in the system, and converts the notification into a format that can be identified by the NETCONF client according to the notification subscription of the NETCONF client; and the NETCONF server sends the converted notification to the NETCONF client. A system and device for sending a NETCONF-based notification are also disclosed. With the present invention, various notification modes are compatible to implement NETCONF-based notifications.