A fragrance emitter used with internet is disclosed. The fragrance emitter is able to emit various kinds of fragrance stored in vessels according to the command sent by a frequency detector which is used to search for the existence of a specific frequency specially used by a specific web site. Therefore, when the existence of a specific frequency matches with a predetermined frequency, the electromagnetic valve is able to activate the movement of a valve mounted on a fragrance vessel in an air tight manner, such that the fragrance is ventilated and mix with the air by a fan.