Disclosed is a method for transmitting reminders for deferred message, the method includes requesting, by client, to set reminders for deferred messages to a application sever (AS); setting, by the application sever, reminders comprising information of when to remind, whether to repeat reminder or not, and/or how many times to repeat; monitoring, by the application sever, time of the set reminders in order to notify the Client; and notifying, by the application sever, the reminders to the client once a timer triggers to send a notification.