The invention relates to the field of the communication technology and discloses a real-time stream protocol event notification method, device and system. The real-time stream protocol event notification method includes the steps that an event state monitoring entity is used for monitoring the state of an event; the event state monitoring entity sends a notification message that the state of the event changes to an event state receiving entity if the event state monitoring entity monitors that the state of the event changes. The real-time stream protocol event notification device comprises an event state monitoring unit and a message sending unit, wherein the event state monitoring unit is used for monitoring the state of the event, and the message sending unit is used for sending the notification message that the state of the event changes when the event state monitoring unit monitors that the state of the event changes. Through the utilization of the real-time stream protocol event notification method, device and system, a corresponding network entity can be notified of the state of the event when the state of the event changes.